In order to seek truth, it is necessary once in the course of our life, to doubt, as far as possible, of all things.

It is as useless for a person to want first of all to decide the externals and after that the fundamentals as it is for a cosmic body, thinking to form itself, first of all to decide the nature of its surface, to what bodies it should turn its light, which its dark side, without first letting the harmony of centrifugal and centripetal forces realize its existence and letting the rest come of itself. One must learn to know oneself before knowing anything else (gnothi seauton). Not until a person has inwardly understood himself and then sees the course he is to take does his life gain peace and meaning.

We sometimes imagine, under the influence of Spenglerian philosophy or some other kind of "historical morphology," that we live in a similar age [to the Romans], the last witnesses of a condemned civilization. But condemned by whom? Not by God, but by some supposed "historical laws." For although we do not know any historical laws, we are in fact able of inventing them quite freely, and such laws, once invented, can then be realized in the form of self-fulfilling prophecies.

Remember that all is opinion.

To say that authority, whether secular or religious, supplies no ground for morality is not to deny the obvious fact that it supplies a sanction.

I cannot read a sentence in the book of the Hindoos without being elevated as upon the table-land of the Ghauts. It has such a rhythm as the winds of the desert, such a tide as the Ganges, and seems as superior to criticism as the Himmaleh Mounts. Even at this late hour, unworn by time with a native and inherent dignity it wears the English dress as indifferently as the Sanscrit.

Few people who are not actually practitioners of a mature science realize how much mop-up work of this sort a paradigm leaves to be done or quite how fascinating such work can prove in the execution.

Evil perpetually tends to disappear.

It is not without good reason said, that he who has not a good memory should never take upon him the trade of lying.

It is a bad plan that admits of no modification.

Thou shouldst not become presumptuous through much treasure and wealth; for in the end it is necessary for thee to leave all.

Again, Amyclas the Heracleotean, one of Plato's familiars, and Menæchmus, the disciple, indeed, of Eudoxus, but conversant with Plato, and his brother Dinostratus, rendered the whole of geometry as yet more perfect. But Theudius, the Magnian, appears to have excelled, as well in mathematical disciplines, as in the rest of philosophy. For he constructed elements egregiously, and rendered many particulars more universal. Besides, Cyzicinus the Athenian, flourished at the same period, and became illustrious in other mathematical disciplines, but especially in geometry. These, therefore, resorted by turns to the Academy, and employed themselves in proposing common questions.

Pardon me, my friends, I have ventured to paint my happiness on the wall.

For what gives my work its peculiar quality, and what is most remarkable in the present age, is this. Fortune has guided almost all the affairs of the world in one direction and has forced them to incline towards one and the same end; a historian should likewise bring before his readers under one synoptical view the operations by which she has accomplished her general purpose.

Much reading after a certain age diverts the mind from its creative pursuits. Any man who reads too much and uses his own brain too little falls into lazy habits of thinking, just as the man who spends too much time in the theaters is apt to be content with living vicariously instead of living his own life.

No man has received from nature the right to give orders to others. Freedom is a gift from heaven, and every individual of the same species has the right to enjoy it as soon as he is in enjoyment of his reason.

Science doesn't purvey absolute truth. Science is a mechanism. It's a way of trying to improve your knowledge of nature. It's a system for testing your thoughts against the universe and seeing whether they match. And this works, not just for the ordinary aspects of science, but for all of life. I should think people would want to know that what they know is truly what the universe is like, or at least as close as they can get to it.

Why does this magnificent applied science which saves work and makes life easier bring us so little happiness? The simple answer runs: Because we have not yet learned to make sensible use of it. In war it serves that we may poison and mutilate each other. In peace it has made our lives hurried and uncertain. Instead of freeing us in great measure from spiritually exhausting labor, it has made men into slaves of machinery, who for the most part complete their monotonous long day's work with disgust and must continually tremble for their poor rations. ... It is not enough that you should understand about applied science in order that your work may increase man's blessings. Concern for the man himself and his fate must always form the chief interest of all technical endeavours; concern for the great unsolved problems of the organization of labor and the distribution of goods in order that the creations of our mind shall be a blessing and not a curse to mankind. Never forget this in the midst of your diagrams and equations.

Today, empathetic intelligence entails sharing the sorrows of other sentient beings. In our posthuman future, will empathy consist entirely in sharing each other's joys?

I can say without affectation that I belong to the Russian convict world no less ... than I do to Russian literature. I got my education there, and it will last forever.

Shame on the soul, to falter on the road of life while the body still perseveres.

Clothe yourself with a hero's courage, and withdraw for a little space from the opinions of the common man. Form a proper conception of the image of virtue, a thing of exceeding beauty and grandeur; this image is not to be worshipped by us with incense or garlands, but with sweat and blood.

Tools arm the man. One can well say that man is capable of bringing forth a world; he lacks only the necessary apparatus, the corresponding armature of his sensory tools. The beginning is there. Thus the principle of a warship lies in the idea of the shipbuilder, who is able to incorporate this thought by making himself into a gigantic machine, as it were, through a mass of men and appropriate tools and materials. Thus the idea of a moment often required monstrous organs, monstrous masses of materials, and man is therefore a potential, if not an actual creator.

Ninety percent of our lives is governed by emotion. Our brains merely register and act upon what is telegraphed to them by our bodily experience. Intellect is to emotion as our clothes are to our bodies; we could not very well have civilized life without clothes, but we would be in a poor way if we had only clothes without bodies.

On this showing, the nature of the breakdowns of civilizations can be summed up in three points: a failure of creative power in the minority, an answering withdrawal of mimesis on the part of the majority, and a consequent loss of social unity in the society as a whole.

The hardness of God is kinder than the softness of men, and His compulsion is our liberation.

Each such answer to the great question, invariably asserted by the followers of its propounder, if not by himself, to be complete and final, remains in high authority and esteem, it may be for one century, or it may be for twenty: but, as invariably, Time proves each reply to have been a mere approximation to the truth-tolerable chiefly on account of the ignorance of those by whom it was accepted, and wholly intolerable when tested by the larger knowledge of their successors.

Whereas materialistic historians and philosophers neglect psychic realities, Freud is inclined to overstress their importance. I am not a psychologist, but it seems to me fairly evident that physiological factors, especially our endocrines, control our destiny ... I am not able to venture a judgment on so important a phase of modern thought. However, it seems to me that psychoanalysis is not always salutary. It may not always be helpful to delve into the subconscious. The machinery of our legs is controlled by a hundred different muscles. Do you think it would help us to walk if we analyzed our legs and knew exactly which one of the little muscles must be employed in locomotion and the order in which they work? ... I am not prepared to accept all his [Freud's] conclusions, but I consider his work an immensely valuable contribution to the science of human behavior. I think he is even greater as a writer than as a psychologist. Freud's brilliant style is unsurpassed by anyone since Schopenhauer.

It is not because the truth is too difficult to see that we make mistakes. It may even lie on the surface; but we make mistakes because the easiest and most comfortable course for us is to seek insight where it accords with our emotions - especially selfish ones.

Advocates of capitalism are very apt to appeal to the sacred principles of liberty, which are embodied in one maxim: The fortunate must not be restrained in the exercise of tyranny over the unfortunate.

The crisis facing men is not the crisis of masculinity, it is the crisis of patriarchal masculinity. Until we make this distinction clear, men will continue to fear that any critique of patriarchy represents a threat.

I do not speak here of divine truths... because they are infinitely superior to nature: God alone can place them in the soul... I know that he has desired that they should enter from the heart into the mind, and not from the mind into the heart, to humiliate that proud power of reasoning that pretends to the right to be the judge of the things that the will chooses; and to cure this infirm will which is wholly corrupted by its filthy attachments.

Yea; have ye never read, Out of the mouth of babes and sucklings thou hast perfected praise?

The death clock is ticking slowly in our breast, and each drop of blood measures its time, and our life is a lingering fever.

A true friend will partake of the wants and sorrows of his friend, as if they were his own; if he be in want, he will relieve him; if he be in prison, he will visit him; if he be sick, he will come to him; nay-situations may occur, in which he would not scruple to die for him. It cannot then be doubted, that friendship is one of the most useful means of procuring a secure, tranquil, and happy life.

What is this wide-spread component of the surface of the earth? and whence did it come? You may think this no very hopeful inquiry. You may not unnaturally suppose that the attempt to solve such problems as these can lead to no result, save that of entangling the inquirer in vague speculations, incapable of refutation and of verification. If such were really the case, I should have selected some other subject than a "piece of chalk" for my discourse. But, in truth, after much deliberation, I have been unable to think of any topic which would so well enable me to lead you to see how solid is the foundation upon which some of the most startling conclusions of physical science rest.

We produce these representations in and from ourselves with the same necessity with which the spider spins. If we are forced to comprehend all things only under these forms, then it ceases to be amazing that in all things we actually comprehend nothing but these forms. For they must all bear within themselves the laws of number, and it is precisely number which is most astonishing in things. All that conformity to law, which impresses us so much in the movement of the stars and in chemical processes, coincides at bottom with those properties which we bring to things. Thus it is we who impress ourselves in this way

Self-control and resistance to distractions. Optimism in adversity-especially illness.

The task of a theory of class is to identify the existing conditions for potential collective struggle and express them as a political proposition.

Each of us believes, quite unconsciously of course, that we alone pursue the truth, which the rest are incapable of seeking out and unworthy of attaining. This madness is so deep-rooted and so useful that it is impossible to realize what would become of each of us if it were someday to disappear.

"Genius" (which means transcendent capacity of taking trouble, first of all).

For myself I say deliberately, it is better to have a millstone tied round the neck and be thrown into the sea than to share the enterprises of those to whom the world has turned, and will turn, because they minister to its weaknesses and cover up the awful realities which it shudders to look at.

I allow nothing for losses by death, but, on the contrary, shall presently take credit four per cent. per annum, for their increase over and above keeping up their own numbers.

Man has to awaken to wonder - and so perhaps do peoples. Science is a way of sending him to sleep again.