The "passion for incredulity" can produce as much self-deception as the uncritical will to believe.

Heaven knows what seeming nonsense may not to-morrow be demonstrated truth.

In obedience to the feeling of reality, we shall insist that, in the analysis of propositions, nothing "unreal" is to be admitted. But, after all, if there is nothing unreal, how, it may be asked, could we admit anything unreal? The reply is that, in dealing with propositions, we are dealing in the first instance with symbols, and if we attribute significance to groups of symbols which have no significance, we shall fall into the error of admitting unrealities, in the only sense in which this is possible, namely, as objects described.

The cup of life is not so shallow

That we have drained the best 

That all the wine at once we swallow 

And lees make all the rest.

Awakening of Western thought will not be complete until that thought steps outside itself and comes to an understanding with the search for a world-view as this manifests itself in the thought of mankind as a whole. We have too long been occupied with the developing series of our own philosophical systems, and have taken no notice of the fact that there is a world-philosophy of which our Western philosophy is only a part. If, however, one conceives philosophy as being a struggle to reach a view of the world as a whole, and seeks out the elementary convictions which are to deepen it and give it a sure foundation, one cannot avoid setting our own thought face to face with that of the Hindus, and of the Chinese in the Far East. ... Our Western philosophy, if judged by its own latest pronouncements, is much naiver than we admit to ourselves, and we fail to perceive this only because we have acquired the art of expressing what is simple in a pedantic way.

In the part of this universe that we know there is great injustice, and often the good suffer, and often the wicked prosper, and one hardly knows which of those is the more annoying.

What is food to one, is to others bitter poison.

Christianity taught only what the whole of Asia knew already long before and even better.

Maybe this world is another planet's Hell.

Poetry can be written only because it has been written.

Let us not admit discourses by Epicureans or Pyrrhonists - though indeed the gods have already in their wisdom destroyed their works, so that most of their books are no longer available. Nevertheless, there is no reason why I should not, by way of example, mention these works too, to show what sort of discourses priests must especially avoid; and if such discourses, then much more must they avoid such thoughts.

He whom God has touched will always be a being apart: he is, whatever he may do, a stranger among men; he is marked by a sign.

The atheist who affects to reason, and the fanatic who rejects reason, plunge themselves alike into inextricable difficulties. The one perverts the sublime and enlightening study of natural philosophy into a deformity of absurdities by not reasoning to the end. The other loses himself in the obscurity of metaphysical theories, and dishonours the Creator, by treating the study of his works with contempt. The one is a half-rational of whom there is some hope, the other a visionary to whom we must be charitable.

Socrates is reported to have replied, when a certain person complained of having received no benefit from his travels: "It serves you right! You travelled in your own company!"

The order of nature cannot be justified by the mere observation of nature. For there is nothing in the present fact which inherently refers either to the past or to the future.... It illustrates the anti-rationalism of the scientific public that, when Hume did appear, it was only the religious implications of his philosophy which attracted attention. This was because the clergy were in principle rationalists, whereas the men of science were content with a simple faith in the order of nature.

When an active individual of sound common sense perceives the sordid state of the world, desire to change it becomes the guiding principle by which he organizes given facts and shapes them into a theory. The methods and categories as well as the transformation of the theory can be understood only in connection with his taking of sides. This, in turn, discloses both his sound common sense and the character of the world. Right thinking depends as much on right willing as right willing on right thinking.

Hitherto men have speculated vaguely on the unity of universes; it is now about to be demonstrated by reasoning from the passional world to material, guided by the analogy which exists between the two.

Persons who feel themselves to be exiles in this world-and what noble mind, from Empedocles down, has not had that feeling?-are mightily inclined to believe themselves citizens of another.

When people were committed to the idea that in the field of religion only one plan must be adopted, bloody wars resulted. With the acknowledgment of the principle of religious freedom these wars ceased. The market economy safeguards peaceful economic co-operation because it does not use force upon the economic plans of the citizens. If one master plan is to be substituted for the plans of each citizen, endless fighting must emerge. Those who disagree with the dictator's plan have no other means to carry on than to defeat the despot by force of arms.

I have no reason to suppose that Lenin gained his ideas from my books; but if that were true, I should be not a little proud of having contribute to the intellectual development of a man who seems to me to be at once the greatest theoretician of socialism since Marx and a statesman whose genius recalls that of Peter the Great.

Depart then satisfied, for he also who releases thee is satisfied.

A sub-clerk in the post office is the equal of a conqueror if consciousness is common to them. All experiences are indifferent in this regard. There are some that do either a service or a disservice to man. They do him a service if he is conscious. Otherwise, that has no importance: a man's failures imply judgment, not of circumstances, but of himself.

One Step Forward, Two Steps Backward, written by Lenin, an outstanding member of the Iskra group, is a methodical exposition of the ideas of the ultra-centralist tendency in the Russian movement. The viewpoint presented with incomparable vigor and logic in this book, is that of pitiless centralism.

An intuitionist conception of justice is, one might say, but half a conception.

Do not yet see, that, if the single man plant himself indomitably on his instincts, and there abide, the huge world will come round to him.

Gottlob Frege created modern logic including "for all," "there exists," and rules of proof. Leibniz and Boole had dealt only with what we now call "propositional logic" (that is, no "for all" or "there exists"). They also did not concern themselves with rules of proof, since their aim was to reach truth by pure calculation with symbols for the propositions. Frege took the opposite track: instead of trying to reduce logic to calculation, he tried to reduce mathematics to logic, including the concept of number.

The Kingdom is like a wise fisherman who cast his net into the sea and drew it up from the sea full of small fish. Among them the wise fisherman found a fine large fish. He threw all the small fish back into the sea and chose the large fish without difficulty. Whoever has ears to hear, let him hear.

They defend their errors as if they were defending their inheritance.

Beauty is the mark God sets upon virtue.

I have twice gone fishing with rod and line just because other boys asked me to, but this sport was soon made impossible for me by the treatment of the worms that were put on the hook for bait, and the wrenching of the mouths of the fishes that were caught. I gave it up, and even found courage enough to dissuade other boys from going.

I urge you to please notice when you are happy, and exclaim or murmur or think at some point, "If this isn't nice, I don't know what is."

Reason perhaps teaches certain bourgeois virtues, but it does not make either heroes or saints.

In the case of most pains let this remark of Epicurus aid thee, that the pain is neither intolerable nor everlasting, if thou bear in mind that it has its limits, and if thou addest nothing to it in imagination…

Capital is money: Capital is commodities. For the movement, in the course of which it adds surplus-value, is its own movement, its expansion, therefore, is automatic expansion. Because it is value, it has acquired the occult quality of being able to add value to itself. It brings forth living offspring, or, at the least, lays golden eggs.

For love of bustle is not industry - it is only the restlessness of a hunted mind.

Language forms a kind of wealth, which all can make use of at once without causing any diminution of the store, and which thus admits a complete community of enjoyment; for all, freely participating in the general treasure, unconsciously aid in its preservation.

Once we know our weaknesses they cease to do us any harm.

Fascism is not defined by the number of its victims, but by the way it kills them.

In the present state of society it appears necessary to go back to first principles in search of the most simple truths, and to dispute with some prevailing prejudice every inch of ground. To clear my way, I must be allowed to ask some plain questions, and the answers will probably appear as unequivocal as the axioms on which reasoning is built; though, when entangled with various motives of action, they are formally contradicted either by the words or conduct of men.

This is a strange -- and rather alarming -- realisation. For it clearly implies that masturbation is one of our highest faculties that human beings have developed. Many animals masturbate -- but never without the presence of another animal, or some similar stimulus. A human being can masturbate in an empty room: a triumph of pure imagination.

Thought depends largely on the stomach. In spite of this, those with the best stomachs are not always the best thinkers.

Louisiana, as ceded by France to the United States, is made a part of the United States; its white inhabitants shall be citizens, and stand, as to their rights and obligations, on the same footing with other citizens of the United States, in analogous situations.

The person who screams, or uses the superlative degree, or converses with heat, puts whole drawing-rooms to flight. If you wish to be loved, love measure. You must have genius or a prodigious usefulness if you will hide the want of measure.