As we can not give a general definition of energy, the principle of the conservation of energy signifies simply that there is something which remains constant.

The object of this Essay is to explain as clearly as I am able grounds of an opinion which I have held from the very earliest period when I had formed any opinions at all on social political matters, and which, instead of being weakened or modified, has been constantly growing stronger by the progress reflection and the experience of life. That the principle which regulates the existing social relations between the two sexes - the legal subordination of one sex to the other - is wrong itself, and now one of the chief hindrances to human improvement; and that it ought to be replaced by a principle of perfect equality, admitting no power or privilege on the one side, nor disability on the other.

Again, we should notice the force, effect, and consequences of inventions, which are nowhere more conspicuous than in those three which were unknown to the ancients; namely, printing, gunpowder, and the compass. For these three have changed the appearance and state of the whole world; first in literature, then in warfare, and lastly in navigation: and innumerable changes have been thence derived, so that no empire, sect, or star, appears to have exercised a greater power and influence on human affairs than these mechanical discoveries.

His master was angry, and delivered him to the torturers until he should pay all that was due to him. "So My heavenly Father also will do to you if each of you, from his heart, does not forgive his brother his trespasses."

So dazzling was the spread of constellations that it had the impact of a vision, of some hidden insight. I drove home saying to myself: The dead, too, are like this, blazing within us - invisibly.

Who is to determine what the perfect is? It could only be those who are themselves perfect and who therefore know what it means. Here yawns the abyss of that circularity in which the whole of human Dasein moves. What health is, only the healthy can say. Yet healthfulness is measured according to the essential starting point of health. What truth is, only one who is truthful can discern; but the one who is truthful is determined according to the essential starting point of truth.

It is not Matter itself that is here meant, but the ultimate Cause of things incorporeal, which also existed before Matter. Moreover, it is asserted by Heraclitus: "Death unto souls is but a change to liquid." This Attis, therefore, the intelligible Power, the holder together of things material below the Moon, having intercourse with the pre-ordained Cause of Matter, holds intercourse therewith, not as a male with a female, but as though flowing into it, since he is the same with it.

Progress, far from consisting in change, depends on retentiveness. When change is absolute there remains no being to improve and no direction is set for possible improvement: and when experience is not retained, as among savages, infancy is perpetual. Those who cannot remember the past are condemned to repeat it. This famous statement has produced many paraphrases and variants: Those who cannot learn from history are doomed to repeat it. Those who do not remember their past are condemned to repeat their mistakes. Those who do not read history are doomed to repeat it. Those who fail to learn from the mistakes of their predecessors are destined to repeat them. Those who do not know history's mistakes are doomed to repeat them.

Propaganda in favor of action that is consonant with enlightened self-interest appeals to reason by means of logical arguments based upon the best available evidence fully and honestly set forth. Propaganda in favor of action dictated by the impulses that are below self-interest offers false, garbled or incomplete evidence, avoids logical argument and seeks to influence its victims by the mere repetition of catchwords, by the furious denunciation of foreign or domestic scapegoats, and by cunningly associating the lower passions with the highest ideals, so that atrocities come to be perpetrated in the name of God and the most cynical kind of Realpolitik is treated as a matter of religious principle and patriotic duty.

Normally man's mind is composed only of a consciousness of his immediate needs, which is to say that this consciousness at any moment can be defined as ''his awareness of his own power to satisfy those needs.'' He thinks in terms of what he intends to do in half an hour's time, a day's time, a month's time an no more. He never asks himself: what are the ''limits'' of my powers? In a sense, he is like a man who has a fortune is the bank, who never asks himself, How much money have I got, but only, Have I enough for a pound of cheese, a new tie, etc.

From my youth onwards, I have felt sure that all thought which thinks itself out to an issue ends in mysticism. In the stillness of the African jungle I have been able to work out this thought and give it expression.

The voice in my soul in which I will have faith, and for the sake of which I have faith in all else, does not merely command me generally to act, but in every particular situation it declares what I shall do and what leave undone; it accompanies me through every event of my life, and it is impossible for me to contend against it. To listen to it and obey it honestly and impartially, without fear or equivocation, is the business of my existence. My life is no longer an empty I play without truth or significance. It is appointed that what I conscience ordains me shall be done, and for this purpose am I here. I have understanding to know, and power to execute it. By conscience alone comes truth and reality into my representations.

The belief that torture is always wrong is a prejudice inherited from an obsolete philosophy. We need to shed the belief that human rights are violated when a terrorist is tortured. As Rawls and others have shown, basic freedoms must form a coherent whole. Self-evidently, there can be no right to attack basic human rights. Therefore, once the proper legal procedures are in place, torturing terrorists cannot violate their rights. In fact, in a truly liberal society, terrorists have an inalienable right to be tortured.This is what demonstrates the moral superiority of liberal societies over others, past and present. Other societies have degraded terrorists by subjecting them to lawless and unaccountable power. In the new world that is taking shape, terrorists, although they themselves degrade human rights by practising terrorism, will be afforded the full dignity of due legal process, even while being tortured.

We are all instruments endowed with feeling and memory. Our senses are so many strings that are struck by surrounding objects and that also frequently strike themselves.

We see then, commodities are in love with money, but "the course of true love never did run smooth".

Modem mainstream economic theory bravely assumes that people make their decisions in such a way as to maximize their utility. Accepting this assumption enables economics to predict a great deal of behavior (correctly or incorrectly) without ever making empirical studies of human actors.

"The physical world is real." That is supposed to be the fundamental hypothesis. What does "hypothesis" mean here? For me, a hypothesis is a statement, whose truth must be assumed for the moment, but whose meaning must be raised above all ambiguity. The above statement appears to me, however, to be, in itself, meaningless, as if one said: "The physical world is cock-a-doodle-do." It appears to me that the "real" is an intrinsically empty, meaningless category (pigeon hole), whose monstrous importance lies only in the fact that I can do certain things in it and not certain others.

To live, by definition, is not something one learns. Not from oneself, it is not learned from life, taught by life. Only from the other and by death. In any case from the other at the edge of life. At the internal border or the external border, it is a heterodidactics between life and death.

Is there anything we cannot contrive to call the demands of the times, and is there anything that does not acquire a certain prestige by being the demand of the times? But for decisive religious categories to become the demand for the times is eo ipso a contradiction. “The times” is too abstract a category to be able as claimant to demand the decisive religious categories that belong specifically to individuality and particularity; loud collective demands en mass for what can be shared only by the single individual in particularity, in solitariness, in silence, cannot be made.

Look at everything that exists, and observe that it is already in dissolution and change, and as it were putrefaction or dispersion, or that everything is so constituted in nature as to die.

But after these, Pythagoras changed that philosophy, which is conversant about geometry itself, into the form of a liberal doctrine, considering its principles in a more exalted manner; and investigating its theorems immaterially and intellectually; who likewise invented a treatise of such things as cannot be explained in geometry, and discovered the constitution of the mundane figures.

In my work, I have always tried to unite the true with the beautiful; but when I had to choose one or the other, I usually chose the beautiful. In a conversation with Freeman Dyson.

A man who is free is like a mangy sheep in a herd. He will contaminate my entire kingdom and ruin my work.

If we would regain our freedom, we must shake off the burden of sensation, no longer react to the world by our senses, break our bonds. For all sensation is a bond, pleasure as much as pain, joy as much as misery. The only free mind is the one that, pure of all intimacy with beings or objects, plies its own vacuity.

Each of the parts of philosophy is a philosophical whole, a circle rounded and complete in itself. In each of these parts, however, the philosophical Idea is found in a particular specificality or medium. The single circle, because it is a real totality, bursts through the limits imposed by its special medium, and gives rise to a wider circle. The whole of philosophy in this way resembles a circle of circles. The Idea appears in each single circle, but, at the same time, the whole Idea is constituted by the system of these peculiar phases, and each is a necessary member of the organisation.

An optimistic view of the future would indicate that before long, the clear necessity of expanding humanity's horizons would cause ... space settlements to be built. The construction would also serve as a great project that not only would be clearly of great benefit, but might induce human cooperation in something large enough to fire the heart and mind, and make people forget the petty quarrels that have engaged them for thousands of years in wars over insignificant scraps of earthly territory.

Only lay down true principles, and adhere to them inflexibly. Do not be frightened into their surrender by the alarms of the timid, or the croakings of wealth against the ascendency of the people.

It is only he, possessed of all sagely qualities that can exist under heaven, who shows himself quick in apprehension, clear in discernment, of far-reaching intelligence, and all-embracing knowledge, fitted to exercise rule; magnanimous, generous, benign, and mild, fitted to exercise forbearance; impulsive, energetic, firm, and enduring, fitted to maintain a firm hold; self-adjusted, grave, never swerving from the Mean, and correct, fitted to command reverence; accomplished, distinctive, concentrative, and searching, fitted to exercise discrimination. All-embracing is he and vast, deep and active as a fountain, sending forth in their due season his virtues. All-embracing and vast, he is like Heaven. Deep and active as a fountain, he is like the abyss. He is seen, and the people all reverence him; he speaks, and the people all believe him; he acts, and the people all are pleased with him.

Impossible for me to know whether or not I take myself seriously. The drama of detachment is that we cannot measure its progress. We advance into a desert, and we never know where we are in it.

If the Communists conquered the world, it would be very unpleasant for a while, but not forever. But if the human race is wiped out, that is the end.

Not the external and physical alone is now managed by machinery, but the internal and spiritual also. Here too nothing follows its spontaneous course, nothing is left to be accomplished by old natural methods. Everything has its cunningly devised implements, its preestablished apparatus; it is not done by hand, but by machinery.

The first consequence of the principle of bounded rationality is that the intended rationality of an actor requires him to construct a simplified model of the real situation in order to deal with it. He behaves rationally with respect to this model, and such behavior is not even approximately optimal with respect to the real world. To predict his behavior we must understand the way in which this simplified model is constructed, and its construction will certainly be related to his psychological properties as a perceiving, thinking, and learning animal.

The masses are our masters; and for every one who looks facts in the face his existence has become dependent on them, so that the thought of them must control his doings, his cares, and his duties. Even an articulated mass always tends to become unspiritual and inhuman. It is life without existence, superstitions without faith. It may stamp all flat; it is disinclined to tolerate independence and greatness, but prone to constrain people to become as automatic as ants.

The aim of art, the aim of a life can only be to increase the sum of freedom and responsibility to be found in every man and in the world. It cannot, under any circumstances, be to reduce or suppress that freedom, even temporarily.

Forgiveness is the key to action and freedom.

And since these things are so, we must suppose that there are contained many things and of all sorts in the things that are uniting, seeds of all things, with all sorts of shapes and colours and savours.

Nay, men, if any of you had heeded what I was ever foretelling and advising, ye would now neither be fearing a single man nor putting your hopes in a single man.

Do you believe in dreams, Uncle Simeon? I do; I believe in nothing else. One night I dreamed that invisible enemies had me tied to a dead cypress. Long red arrows were sticking into me from my head to my feet, and the blood was flowing. On my head they had placed a crown of thorns, and intertwined with the thorns were fiery letters which said: "Saint Blasphemer." I am Saint Blasphemer, Rabbi Simeon. So you'd better not ask me anything else, or I'll start my blasphemies.

The pride connected with knowing and sensing lies like a blinding fog over the eyes and senses of men, thus deceiving them concerning the value of existence. For this pride contains within itself the most flattering estimation of the value of knowing. Deception is the most general effect of such pride, but even its most particular effects contain within themselves something of the same deceitful character.

The one is ready even to sacrifice itself for the good of others, the other to plunge into peril provided it drags others with it.

Philosophy was never just ontotheology, and even when philosophers were concerned with ontotheology, they were concerned with much more than that. That is the first reason that the idea of a fundamental "crisis" in philosophy and of the "end of philosophy" is deeply mistaken. And if the questions of philosophy are indeed "unsettleable," in the sense that they will always be with us, that is a wonderful thing, not something to be regretted.

Whenever a human being, through the commission of a crime, has become exiled from good, he needs to be reintegrated with it through suffering. The suffering should be inflicted with the aim of bringing the soul to recognize freely some day that its infliction was just. This reintegration with the good is what punishment is. Every man who is innocent, or who has finally expiated guilt, needs to be recognized as honourable to the same extent as anyone else.

It is difficult, it is impossible to believe that the Good Lord - "Our Father" - had a hand in the scandal of creation. Everything suggests that He took no part in it, that it proceeds from a god without scruples, a feculent god. Goodness does not create, lacking imagination; it takes imagination to put together a world, however botched. At the very least, there must be a mixture of good and evil in order to produce an action or a work.

It seemed clear to me that life and the world somehow depended upon me now. I may almost say that the world now seemed created for me alone: if I shot myself the world would cease to be at least for me. I say nothing of its being likely that nothing will exist for anyone when I am gone, and that as soon as my consciousness is extinguished the whole world will vanish too and become void like a phantom, as a mere appurtenance of my consciousness, for possibly all this world and all these people are only me myself.

The mad mob does not ask how it could be better, only that it be different. And when it then becomes worse, it must change again. Thus they get bees for flies, and at last hornets for bees. Whether Soldiers Can Also Be in a State of Grace

I seem to myself, among civilised men, an intruder, a troglodyte enamored of decrepitude, plunged into subversive prayers.

The refusal of work and authority, or really the refusal of voluntary servitude, is the beginning of liberatory politics.