There is but one truly serious philosophical problem and that is suicide. Judging whether life is or is not worth living amounts to answering the fundamental question of philosophy. All the rest, whether or not the world has three dimensions, whether the mind has nine or twelve categories comes afterwards. These are games; one must first answer. And if it is true, as Nietzsche claims, that a philosopher, to deserve our respect, must preach by example, you can appreciate the importance of that reply, for it will precede the definitive act. These are facts the heart can feel; yet they call for careful study before they become clear to the intellect. If I ask myself how to judge that this question is more urgent than that, I reply that one judges by the actions it entails. I have never seen anyone die for the ontological argument. Absurdity and Suicide

The monuments of wit survive the monuments of power.

I would have written a shorter letter, but I did not have the time.

The pervasiveness of social dilemmas has repeatedly been recognized in the great books of political philosophy. Hobbes described such a setting as a "war of all against all." Rousseau used a stag hunt to illustrate the problem of a group needing to all work together to hunt a large animal but facing the temptation to break up into separate groups when small animals appeared on the scene that were easy to catch. A small group could catch a rabbit, but ruined the chance for the group to obtain a large animal. Elinor Ostrom, Understanding Institutional Diversity (2005), Ch. 2 : Zooming In and Linking Action Situations

A lifetime is a child playing, playing checkers; the kingdom belongs to a child.

A young man before he leaves the shelter of his father's house, and the guard of a tutor, should be fortify'd with resolution, and made acquainted with men, to secure his virtues, lest he should be led into some ruinous course, or fatal precipice, before he is sufficiently acquainted with the dangers of conversation, and his steadiness enough not to yield to every temptation.

The facts of science, as they appeared to him [Heraclitus], fed the flame in his soul, and in its light, he saw into the depths of the world.

And, being assembled together with them, commanded them that they should not depart from Jerusalem, but wait for the promise of the Father, which, saith he, ye have heard of me. For John truly baptized with water; but ye shall be baptized with the Holy Ghost not many days hence. 1:4-5 (KJV)

The Idols of Tribe have their foundation in human nature itself, and in the tribe or race of men. For it is a false assertion that the sense of man is the measure of things. On the contrary, all perceptions as well of the sense as of the mind are according to the measure of the individual and not according to the measure of the universe. And the human understanding is like a false mirror, which, receiving rays irregularly, distorts and discolors the nature of things by mingling its own nature with it.

The stars, like dust, encircle meIn living mists of light;And all of space I seem to seeIn one vast burst of sight.

In public, as well as in private expences, great wealth may, perhaps, frequently be admitted as an apology for great folly.

Rules necessary for demonstrations. To prove all propositions, and to employ nothing for their proof but axioms fully evident of themselves, or propositions already demonstrated or admitted; Never to take advantage of the ambiguity of terms by failing mentally to substitute definitions that restrict or explain them.

The law of simplicity and naïveté applies to all fine art, for it is compatible with what is most sublime. True brevity of expression consists in a man only saying what is worth saying, while avoiding all diffuse explanations of things which every one can think out for himself; that is, it consists in his correctly distinguishing between what is necessary and what is superfluous. On the other hand, one should never sacrifice clearness, to say nothing of grammar, for the sake of being brief. To impoverish the expression of a thought, or to obscure or spoil the meaning of a period for the sake of using fewer words shows a lamentable want of judgment.

As the analysis of a substantial composite terminates only in a part which is not a whole, that is, in a simple part, so synthesis terminates only in a whole which is not a part, that is, the world.

Were a stranger to drop on a sudden into this world, I would show him, as a specimen of its ills, a hospital full of diseases, a prison crowded with malefactors and debtors, a field of battle strewed with carcasses, a fleet foundering in the ocean, a nation languishing under tyranny, famine, or pestilence. To turn the gay side of life to him, and give him a notion of its pleasures; whither should I conduct him? to a ball, to an opera, to court? He might justly think, that I was only showing him a diversity of distress and sorrow.

The first duty of a man is the seeking after and the investigation of truth.

I do not have much liking for the too famous existential philosophy, and, to tell the truth, I think its conclusions false.

Yea; have ye never read, Out of the mouth of babes and sucklings thou hast perfected praise? 21:16 (KJV)

Of all Discourse, governed by desire of Knowledge, there is at last an End, either by attaining, or by giving over.

How selfish soever man may be supposed, there are evidently some principles in his nature, which interest him in the fortune of others, and render their happiness necessary to him, though he derives nothing from it except the pleasure of seeing it.

Of all the things that are beyond my power, I value nothing more highly than to be allowed the honor of entering into bonds of friendship with people who sincerely love truth. For, of things beyond our power, I believe there is nothing in the world which we can love with tranquility except such men.

If man in the state of nature be so free, as has been said; if he be absolute lord of his own person and possessions, equal to the greatest, and subject to no body, why will he part with his freedom, this empire, and subject himself to the dominion and control of any other power?

Cleanness of body was ever deemed to proceed from a due reverence to God.

For knowledge itself is power.

Those who assert that the mathematical sciences say nothing of the beautiful or the good are in error. For these sciences say and prove a great deal about them; if they do not expressly mention them, but prove attributes which are their results or definitions, it is not true that they tell us nothing about them. The chief forms of beauty are order and symmetry and definiteness, which the mathematical sciences demonstrate in a special degree.

Let us be understood. If the Japanese surrender after the destruction of Hiroshima, having been intimidated, we will rejoice. But we refuse to see anything in such grave news other than the need to argue more energetically in favor of a true international society, in which the great powers will not have superior rights over small and middle-sized nations, where such an ultimate weapon will be controlled by human intelligence rather than by the appetites and doctrines of various states. Before the terrifying prospects now available to humanity, we see even more clearly that peace is the only goal worth struggling for. This is no longer a prayer but a demand to be made by all peoples to their governments a demand to choose definitively between hell and reason.

The modern scientific counterpart to belief in God is the belief in the universe as an organism: this disgusts me. This is to make what is quite rare and extremely derivative, the organic, which we perceive only on the surface of the earth, into something essential, universal, and eternal! This is still an anthropomorphizing of nature!

And as in other things, so in men, not the seller, but the buyer determines the Price.

I soon perceived that she possessed in combination, the qualities which in all other persons whom I had known I had been only too happy to find singly. In her, complete emancipation from every kind of superstition (including that which attributes a pretended perfection to the order of nature and the universe), and an earnest protest against many things which are still part of the established constitution of society, resulted not from the hard intellect, but from strength of noble and elevated feeling, and co-existed with a highly reverential nature.

It is not titles that make men illustrious, but men who make titles illustrious.

Can the children of the bridechamber mourn, as long as the bridegroom is with them? but the days will come, when the bridegroom shall be taken from them, and then shall they fast. No man putteth a piece of new cloth unto an old garment, for that which is put in to fill it up taketh from the garment, and the rent is made worse. Neither do men put new wine into old bottles: else the bottles break, and the wine runneth out, and the bottles perish: but they put new wine into new bottles, and both are preserved. 9:15-17 (KJV)

No man is free who is not master of himself.

If there were in the world today any large number of people who desired their own happiness more than they desired the unhappiness of others, we could have a paradise in a few years.

The prejudices of the second species, since they impose upon the intellect by the sensual conditions restricting the mind if it wishes in certain cases to attain to what is intellectual, lurk more deeply. One of them is that which affects knowledge of quantity, the other that affecting knowledge of qualities generally. The former is: every actual multiplicity can be given numerically, and hence, every infinite quantity; the latter, whatever is impossible contradicts itself. In either of them the concept of time, it is true, does not enter into the very notion of the predicate, nor is it attributed as a qualification to the subject. But yet it serves as a means for forming an idea of the predicate, and thus, being a condition, affects the intellectual concept of the subject to the extent that the latter is only attained by its aid.

And why should man, added he, pretend to an exemption from the lot of all other animals? The whole earth, believe me, PHILO, is cursed and polluted. A perpetual war is kindled amongst all living creatures. Necessity, hunger, want, stimulate the strong and courageous: Fear, anxiety, terror, agitate the weak and infirm. The first entrance into life gives anguish to the new-born infant and to its wretched parent: Weakness, impotence, distress, attend each stage of that life: and it is at last finished in agony and horror.

By a lie a man throws away and, as it were, annihilates his dignity as a man. A man who himself does not believe what he tells another ... has even less worth than if he were a mere thing. ... makes himself a mere deceptive appearance of man, not man himself.

Sincerity is the end and beginning of things; without sincerity there would be nothing. On this account, the superior man regards the attainment of sincerity as the most excellent thing.

Good roads, canals, and navigable rivers, by diminishing the expence of carriage, put the remote parts of the country more nearly upon a level with those of the neighbourhood of the town. They are upon that the greatest of all improvements.

The direction of the world overwhelms me at this time. In the long run, all the continents (yellow, black and brown) will spill over onto Old Europe. They are hundreds and hundreds of millions. They are hungry and they are not afraid to die. We no longer know how to die or how to kill. We could preach, but Europe believes in nothing. So, we must wait for the year 1000 or a miracle. For my part, I find it harder and harder to live before a wall.

These numerous points at which money is withdrawn from circulation and accumulated in numerous individual hoards or potential money-capitals appears as so many obstacles to circulation, because they immobilise the money and deprive it of its capacity to circulate for a certain time.

Do you suppose that you can do the things you do now, and yet be a philosopher? Do you suppose that you can eat in the same fashion, drink in the same fashion, give way to anger and to irritation, just as you do now?

O immortal gods! Men do not realize how great a revenue parsimony can be!

Science fiction writers foresee the inevitable, and although problems and catastrophes may be inevitable, solutions are not.

That which has no existence cannot be destroyed - that which cannot be destroyed cannot require anything to preserve it from destruction. Natural rights is simple nonsense: natural and imprescriptible rights, rhetorical nonsense - nonsense upon stilts. But this rhetorical nonsense ends in the old strain of mischievous nonsense for immediately a list of these pretended natural rights is given, and those are so expressed as to present to view legal rights. And of these rights, whatever they are, there is not, it seems, any one of which any government can, upon any occasion whatever, abrogate the smallest particle. The often-quoted phrase 'nonsense upon stilts' is often modernised to 'nonsense on stilts'.

Physics is mathematical not because we know so much about the physical world, but because we know so little: it is only its mathematical properties that we can discover.

Doctors are men who prescribe medicine of which they know little, to human beings of whom they know less, to cure diseases of which they know nothing.

If you press me to say why I loved him, I can say no more than it was because he was he, and I was I. Variants: If a man urge me to tell wherefore I loved him, I feel it cannot be expressed but by answering: Because it was he, because it was myself. If a man should importune me to give a reason why I loved him, I find it could no otherwise be expressed, than by making answer: because it was he, because it was I.

Suppose a person entering a house were to feel heat on the porch, and going further, were to feel the heat increasing, the more they penetrated within. Doubtless, such a person would believe there was a fire in the house, even though they did not see the fire that must be causing all this heat. A similar thing will happen to anyone who considers this world in detail: one will observe that all things are arranged according to their degrees of beauty and excellence, and that the nearer they are to God, the more beautiful and better they are.

Wherever Law ends, Tyranny begins.

A person must take care to exercise moderate discipline over the body and subject it to the Spirit by means of fasting, vigils, and labor. The goal is to have the body obey and conform - and not hinder - the inner person and faith. Unless it is held in check, we know it is the nature of the body to undermine faith and the inner person.