The pursuit of individual happiness within those limits prescribed by social conditions, is the first requisite to the attainment of the greatest general happiness.

Justice is the first virtue of social institutions, as truth is of systems of thought. A theory however elegant and economical must be rejected or revised if it is untrue; likewise laws and institutions no matter how efficient and well-arranged must be reformed or abolished if they are unjust. Each person possesses an inviolability founded on justice that even the welfare of society as a whole cannot override. For this reason justice denies that the loss of freedom for some is made right by a greater good shared by others. It does not allow that the sacrifices imposed on a few are outweighed by the larger sum of advantages enjoyed by many. Therefore in a just society the liberties of equal citizenship are taken as settled; the rights secured by justice are not subject to political bargaining or to the calculus of social interests.

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.

Lamarck, sagacious as many of his views were, mingled them with so much that was crude and even absurd, as to neutralize the benefit which his originality might have effected had he been a more sober and cautious thinker…

There lay certitude; there, in the daily round. All the rest hung on mere threads and trivial contingencies; you couldn't waste your time on it. The thing was to do your job as it should be done.

There can be no safer deposit on earth than the Treasury of the United States.

Write as if thou wert alone in the universe and hadst nothing to fear from the jealousies and prejudices of the people. Otherwise thou wilt miss thy purpose.

Prejudices are so to speak the mechanical instincts of men: through their prejudices they do without any effort many things they would find too difficult to think through to the point of resolving to do them.

Considered as the last finish of education, or of human culture, worth and acquirement, the art of speech is noble, and even divine; it is like the kindling of a Heaven's light to show us what a glorious world exists, and has perfected itself, in a man.

If the room is smoky, if only moderately, I will stay; if there is too much smoke I will go. Remember this, keep a firm hold on it, the door is always open.

The foundation of irreligious criticism is: Man makes religion, religion does not make man.

In the natural state no concept of God can arise, and the false one which one makes for himself is harmful. Hence the theory of natural religion can be true only where there is no science; therefore it cannot bind all men together.

Hitch your wagon to a star.

It is justice, not charity, that is wanting in the world.

I am not a "culture critic" because I am not in any way interested in classifying cultural forms. I am a metaphysician, interested in the life of the forms and their surprising modalities. That is why I have no interest in the academic world.

Poetry can be written only because it has been written.

Yes, I dreamed a dream, my dream of the third of November. They tease me now, telling me it was only a dream. But does it matter whether it was a dream or reality, if the dream made known to me the truth? If once one has recognized the truth and seen it, you know that it is the truth and that there is no other and there cannot be, whether you are asleep or awake. Let it be a dream, so be it, but that real life of which you make so much I had meant to extinguish by suicide, and my dream, my dream - oh, it revealed to me a different life, renewed, grand and full of power!

Truth, like light, blinds. Falsehood, on the contrary, is a beautiful twilight that enhances every object.

Metaphysical assertions, however, are statements of the psyche, and are therefore psychological. ... Whenever the Westerner hears the word "psychological," it always sounds to him like "only psychological."

My father was as well aware as anyone that Christians do not, in general, undergo the demoralizing consequences which seem inherent in such a creed, in the manner or to the extent which might have been expected from it. The same slovenliness of thought, and subjection of the reason to fears, wishes, and affections, which enable them to accept a theory involving a contradiction in terms, prevents them from perceiving the logical consequences of the theory. Such is the facility with which mankind believe at one and the same time things inconsistent with one another, and so few are those who draw from what they receive as truths, any consequences but those recommended to them by their feelings, that multitudes have held the undoubting belief in an Omnipotent Author of Hell, and have nevertheless identified that being with the best conception they were able to form of perfect goodness.

Philosophical knowledge is the knowledge gained by reason from concepts; mathematical knowledge is the knowledge gained by reason from the construction of concepts.

Owning our seeds through seed freedom, our own food through food freedom, our own minds and intelligence through intellectual freedom, our own economies through freedom to produce and consume ecologically and locally, is the 'barbarianism' that the 1% would like to extinguish.

Patriotism is an ephemeral motive that scarcely ever outlasts the particular threat to society that aroused it.

Suicide evokes revulsion with horror, because everything in nature seeks to preserve itself: a damaged tree, a living body, an animal; and in man, then, is freedom, which is the highest degree of life, and constitutes the worth of it, to become now a principium for self-destruction? This is the most horrifying thing imaginable. For anyone who has already got so far as to be master, at any time, over his own life, is also master over the life of anyone else; for him, the door stands open to every crime, and before he can be seized he is ready to spirit himself away out of the world. So suicide evokes horror, in that a man thereby puts himself below the beasts. We regard a suicide as a carcase, whereas we feel pity for one who meets his end through fate.

The stars awaken a certain reverence, because though always present, they are inaccessible; but all natural objects make a kindred impression, when the mind is open to their influence. Nature never wears a mean appearance. Neither does the wisest man extort her secret, and lose his curiosity by finding out all her perfection. Nature never became a toy to a wise spirit. The flowers, the animals, the mountains, reflected the wisdom of his best hour, as much as they had delighted the simplicity of his childhood.

The phenomenon of the will in Epictetus, a different mental ability whose chief characteristic is that it speaks an imperative even when it commands nothing but our ability to think. The goal is to annihilate reality insofar it concerns me.

In cases of this sort, let us say adultery, rightness and wrongness do not depend on committing it with the right woman at the right time and in the right manner, but the mere fact of committing such action at all is to do wrong.

Every man bears the whole stamp of the human condition.

Facts are the materials of science, but all Facts involve Ideas. Since, in observing Facts, we cannot exclude Ideas, we must, for the purposes of science, take care that the Ideas are clear and rigorously applied.

Don't let yourself forget how many doctors have died, after furrowing their brows over how many deathbeds. How many astrologers, after pompous forecasts about others' ends. How many philosophers, after endless disquisitions on death and immortality. How many warriors, after inflicting thousands of casualties themselves. How many tyrants, after abusing the power of life and death atrociously, as if they were themselves immortal.

To what shall the character of utility be ascribed, if not to that which is a source of pleasure?

Lay hold of today's task, and you will not need to depend so much upon tomorrow's. While we are postponing, life speeds by.

Shall we say, for example, that Science and Art are indebted principally to the founders of Schools and Universities? Did not Science originate rather, and gain advancement, in the obscure closets of the Roger Bacons, Keplers, Newtons; in the workshops of the Fausts and the Watts; wherever, and in what guise soever Nature, from the first times downwards, had sent a gifted spirit upon the earth? Again, were Homer and Shakspeare members of any beneficed guild, or made Poets by means of it? Were Painting and Sculpture created by forethought, brought into the world by institutions for that end? No; Science and Art have, from first to last, been the free gift of Nature; an unsolicited, unexpected gift; often even a fatal one.

I do not mean to deny the biologic, physiologic, or psychologic factors in creating crime; but there is hardly an advanced criminologist who will not concede that the social and economic influences are the most relentless, the most poisonous germs of crime.

Youth is wholly experimental.

Philosophy can bake no bread; but she can procure for us God, Freedom, Immortality. Which, then, is more practical, Philosophy or Economy?

A word of honour, an oath, is one only for him whom I entitle to receive it; he who forces me to it obtains only a forced, a hostile word, the word of a foe, whom one has no right to trust; for the foe does not give us the right.

A religious symbol does not rest on any opinion. And error belongs only with opinion. One would like to say: This is what took place here; laugh, if you can.

Our experience hitherto justifies us in trusting that nature is the realization of the simplest that is mathematically conceivable. I am convinced that purely mathematical construction enables us to find those concepts and those lawlike connections between them that provide the key to the understanding of natural phenomena. Useful mathematical concepts may well be suggested by experience, but in no way can they be derived from it. Experience naturally remains the sole criterion of the usefulness of a mathematical construction for physics. But the actual creative principle lies in mathematics. Thus, in a certain sense, I take it to be true that pure thought can grasp the real, as the ancients had dreamed.

Christians are beginning to lose the spirit of intolerance which animated them: experience has shown the error of the expulsion of the Jews from Spain, and of the persecution of those Christians in France whose belief differed a little from that of the king. They have realized that zeal for the advancement of religion is different from a due attachment to it; and that in order to love it and fulfill its behests, it is not necessary to hate and persecute those who are opposed to it.

At root what is needed for scientific inquiry is just receptivity to data, skill in reasoning, and yearning for truth. Admittedly, ingenuity can help too.

There remains the final reflection, how shallow, puny, and imperfect are efforts to sound the depths in the nature of things. In philosophical discussion, the merest hint of dogmatic certainty as to finality of statement is an exhibition of folly.

100 per cent of us die, and the percentage cannot be increased.

You get tragedy where the tree, instead of bending, breaks.

There are in our minds in solution a vast number of emotional attitudes, feelings ready to be re-excited when the proper stimulus arrives, and more than anything else it is these forms, this residue of experience, which, fuller and richer than in the mind if the ordinary man, constitute the artist's capital. What is called the magic of the artist resides in his ability to transfer these values from one field of experience to another, to attach them to objects of our common life, and by his imaginative insight make these objects poignant and momentous. Not colors, not sense qualities as such, are either matter or form, but these qualities as thoroughly imbued, impregnated, with transferred value. And then they are either matter or form according to the direction of our interest.

One day, observing a child drinking out of his hands, he cast away the cup from his wallet with the words, "A child has beaten me in plainness of living."

As we speak cruel time is fleeing. Seize the day, believing as little as possible in the morrow.