Placing your stick at the end of the shadow of the pyramid, you made by the sun's rays two triangles, and so proved that the pyramid [height] was to the stick [height] as the shadow of the pyramid to the shadow of the stick.

Who can be forced has not learned how to die.

The distance between oneself and other persons and other species can fall anywhere on a continuum. Even for other persons the understanding of what it is like to be them is only partial, and when one moves to species very different from oneself, a lesser degree of partial understanding may still be available. The imagination is remarkably flexible. My point, however, is not that we cannot know what it is like to be a bat. I am not raising that epistemological problem. My point is rather that even to form a conception of what it is like to be a bat and a fortiori to know what it is like to be a bat, one must take up the bat's point of view.

Be quiet! Anyone can spit in my face, and call me a criminal and a prostitute. But no one has the right to judge my remorse.

What the history of Philosophy shows us is a succession of noble minds, a gallery of heroes of thought, who, by the power of reason, have penetrated into the being of things, of nature and of spirit, into the Being of God, and have won for us by their labours the highest treasure, the treasure of reasoned knowledge.

Rules necessary for definitions. Not to leave any terms at all obscure or ambiguous without definition; Not to employ in definitions any but terms perfectly known or already explained.

The fundamental defect of fathers, in our competitive society, is that they want their children to be a credit to them.

From the point of view of semantics, errors must be accidents: if in the extension of "horse" there are no cows, then it cannot be required for the meaning of "horse" that cows be called horses. On the other hand, if "horse" did not mean that which it means, and if it were an error for horses, it would never be possible for a cow to be called "horse." Putting the two things together, it can be seen that the possibility of falsely saying "this is a horse" presupposes the existence of a semantic basis for saying it truly, but not vice versa. If we put this in terms of the crude causal theory, the fact that cows cause one to say "horse" depends on the fact that horses cause one to say "horse"; but the fact that horses cause one to say "horse" does not depend on the fact that cows cause one to say "horse"...

The fact that the general incidence of leukemia has doubled in the last two decades may be due, partly, to the increasing use of x-rays for numerous purposes. The incidence of leukemia in doctors, who are likely to be so exposed, is twice that of the general public. In radiologists the incidence is ten times greater.

Everything predicted by the enemies of banks, in the beginning, is now coming to pass. We are to be ruined now by the deluge of bank paper. It is cruel that such revolutions in private fortunes should be at the mercy of avaricious adventurers, who, instead of employing their capital, if any they have, in manufactures, commerce, and other useful pursuits, make it an instrument to burden all the interchanges of property with their swindling profits, profits which are the price of no useful industry of theirs.

In our reasonings concerning matter of fact, there are all imaginable degrees of assurance, from the highest certainty to the lowest species of moral evidence. A wise man, therefore, proportions his belief to the evidence.

He kept the middle way, that's all: he was the type of man for whom one has an affection of the mild but steady order - which is the kind that wears best.

The huge laugh is a most extreme expression of freedom.

How abundantly do spiritual beings display the powers that belong to them! We look for them, but do not see them; we listen to, but do not hear them; yet they enter into all things, and there is nothing without them.

For this reason those who are tossed about at sea, who proceed uphill and downhill over toilsome crags and heights, who go on campaigns that bring the greatest danger, are heroes and front-rank fighters; but persons who live in rotten luxury and ease while others toil, are mere turtle-doves safe only because men despise them.

Ethics, too, are nothing but reverence for life. That is what gives me the fundamental principle of morality, namely, that good consists in maintaining, promoting, and enhancing life, and that destroying, injuring, and limiting life are evil.

Invention is the mother of all necessities.

Philosophy hasn't made any progress?-If someone scratches where it itches, do we have to see progress? Is it not genuine scratching otherwise, or genuine itching?

The African [slave] trade was, in his opinion, an absolute robbery. It therefore could not be a doubt with the House, whether it was proper to abolish it.

The remedies for all our diseases will be discovered long after we are dead; and the world will be made a fit place to live in, after the death of most of those by whose exertions it will have been made so. It is to be hoped that those who live in those days will look back with sympathy to their known and unknown benefactors.

Philosophical problems can be compared to locks on safes, which can be opened by dialing a certain word or number, so that no force can open the door until just this word has been hit upon, and once it is hit upon any child can open it.

Do I write out of love to men? No, I write because I want to procure for my thoughts an existence in the world; and, even if I foresaw that these thoughts would deprive you of your rest and your peace, even if I saw the bloodiest wars and the fall of many generations springing up from this seed of thought - I would nevertheless scatter it. Do with it what you will and can, that is your affair and does not trouble me.

The world becomes full of organisms that have what it takes to become ancestors. That, in a sentence, is Darwinism.

The Prodigal Son at least walked home on his own feet. But who can duly adore that Love which will open the high gates to a prodigal who is brought in kicking, struggling, resentful, and darting his eyes in every direction for a chance of escape?

A wrongdoer is often a man who has left something undone, not always one who has done something.

Society is eliminating the prerogatives and privileges of feudal. aristocratic culture together with its content. The fact that the transcending truths of the fine arts, the aesthetics of life and thought, were accessible only to the few wealthy and educated was the fault of a repressive society. But this fault is not corrected by paperbacks, general education, long-playing records, and the abolition of formal dress in the theater and concert hall. The cultural privileges expressed the injustice of freedom, the contradiction between ideology and reality, the separation of intellectual from material productivity; but they also provided a protected realm in which the tabooed truths could survive in abstract integrity-remote from the society which suppressed them.

In particular, at this point also urge governing authorities and parents to rule well and to send their children to school. Point out how they are obliged to do so and what a damnable sin they commit if they do not, for thereby, as the worst enemies of God and humanity, they overthrow and lay waste both the kingdom of God and the kingdom of the world. Explain very clearly what kind of horrible damage they do when they do not help to train children as pastors, preachers, civil servants, etc., and tell them that God will punish them dreadfully for this. For in our day and age it is necessary to preach about these things. The extent to which parents and governing authorities are now sinning in these matters defies description. The devil, too, intends to do something horrible in all this.

For passionate emotions of all sorts, and for everything which has been said or written in exaltation of them, he professed the greatest contempt. He regarded them as a form of madness. "The intense" was with him a bye-word of scornful disapprobation. He regarded as an aberration of the moral standard of modern times, compared with that of the ancients, the great stress laid upon feeling.

My father impressed upon me from the first, that the manner in which the world came into existence was a subject on which nothing was known: that the question, "Who made me?" cannot be answered, because we have no experience or authentic information from which to answer it; and that any answer only throws the difficulty a step further back, since the question immediately presents itself, "Who made God?"

God's love for us is not the reason for which we should love him. God's love for us is the reason for us to love ourselves.

Among the Romans in Christian times Mithras-worship as very widely spread, and so late as the Middle Ages we meet with a secret Mithras-worship ostensibly connected with the order of the Knights-Templars. Mithras thrusting the knife into the neck of the ox is a figurative representation belonging essentially to the cult of Mithras, of which examples have been frequently found in Europe. Hegel, Georg Wilhelm Friedrich, Lectures on the philosophy of religion, together with a work on the proofs of the existence of God.

Violence and freedom are the two endpoints on the scale of power.

Men became scientific because they expected law in Nature; and they expected law in Nature because they believed in a Legislator.

If we compare the third-person attitude of someone who simply says how things stand (this is the attitude of the scientist, for example) with the performative attitude of someone who tries to understand what is said to him (this is the attitude of the interpreter, for example), the implications ... become clear. ... First, interpreters relinquish superiority that observers have by virtue of their privileged position, in that they themselves are drawn, at least potentially, into negotiations about the meaning and validity of utterances. By taking part in communicative action, they accept in principle the same status as those whose utterances they are trying to understand. ... It is impossible to decide a priori who is to learn from whom.

Seize the moments of happiness, love and be loved! That is the only reality in the world, all else is folly. It is the one thing we are interested in here.

The great secret of success is to go through life as a man who never gets used up. That is possible for him who never argues and strives with men and facts, but in all experience retires upon himself, and looks for the ultimate cause of things in himself.

I have always said, and always will say, that the studious perusal of the sacred volume will make better citizens, better fathers, and better husbands.

An eternal purgatory, then, rather than a heaven of glory; an eternal ascent. If there is an end to all suffering, however pure and spiritualized we may suppose it to be, if there is an end to all desire, what is it that makes the blessed in paradise go on living? If in paradise they do not suffer for want of God, how shall they love Him? And if there, in the heaven of glory, while they behold God little by little and closer and closer, yet without ever wholly attaining Him, there does not always remain something more for them to know and desire, if there does not always remain a substratum of doubt, how shall they not fall asleep?

It is the natural effect of improvement, however, to diminish gradually the real price of almost all manufactures.

We are to admit no more causes of natural things than such as are both true and sufficient to explain their appearances.

Nothing is harder to understand than a symbolic work. A symbol always transcends the one who makes use of it and makes him say in reality more than he is aware of expressing.

Pure Mathematics is the class of all propositions of the form "p implies q," where p and q are propositions containing one or more variables, the same in the two propositions, and neither p nor q contains any constants except logical constants. And logical constants are all notions definable in terms of the following: Implication, the relation of a term to a class of which it is a member, the notion of such that, the notion of relation, and such further notions as may be involved in the general notion of propositions of the above form. In addition to these, mathematics uses a notion which is not a constituent of the propositions which it considers, namely the notion of truth.

We are in a logic of simulation, which no longer has anything to do with a logic of facts and an order of reason. Simulation is characterized by a precession of the model, of all the models based on the merest fact-the models come first, their circulation, orbital like that of the bomb, constitutes the genuine magnetic field of the event. The facts no longer have a specific trajectory, they are born at the intersection of models, a single fact can be engendered by all the models at once.

A house sold by A to B does not wander from one place to another, although it circulates as a commodity.

Between the Shaman of the Tungus, the European prelate who rules church and state, the Voguls, and the Puritans, on the one hand, and the man who listens to his own command of duty, on the other, the difference is not that the former make themselves slaves, while the latter is free, but that the former have their lord outside themselves, while the latter carries his lord in himself, yet at the same time is his own slave.

To be old is a glorious thing when one has not unlearned what it means to begin, this old man had perhaps first learned it thoroughly in old age.