So rolling time changes the seasons of things. What was of value, becomes in turn of no worth.

If it were so, as conceited sagacity, proud of not being deceived, thinks, that we should believe nothing that we cannot see with our physical eyes, then we first and foremost ought to give up believing in love. ... We can be deceived by believing what is untrue, but we certainly are also deceived by not believing what is true. ... Which deception is more dangerous?

An avidity to punish is always dangerous to liberty. It leads men to stretch, to misinterpret, and to misapply even the best of laws. He that would make his own liberty secure must guard even his enemy from oppression; for if he violates this duty he establishes a precedent that will reach to himself.

When thou art offended at any man's fault, forthwith turn to thyself and reflect in what manner thou doest error thyself... For by attending to this thou wilt quickly forget thy anger, if this consideration is also added, that the man is compelled; for what else could he do? or, if thou art able, take away from him the compulsion.

The state monopolizes violence by calling its critics "violent". Hence, we should be wary about those who claim that violence is necessary to curb or check violence; those who praise the forces of law, including the police and the prisons, as the final arbiters. To oppose violence is to understand that violence does not always take the form of the blow.

Notwithstanding their attacks on the basic conception of rationalism, on synthetic a priori judgments, that is, material propositions that cannot be contradicted by any experience, the empiricist posits the forms of being as constant.

Pyrrhus said, "If I should overcome the Romans in another fight, I were undone."

A good guide will take you through the more important streets more often than he takes you down side streets; a bad guide will do the opposite. In philosophy I'm a rather bad guide.

In theory there is nothing to hinder our following what we are taught; but in life there are many things to draw us aside.

We ought neither to fasten our ship to one small anchor nor our life to a single hope.

How many people ruin themselves by laying out money on trinkets of frivolous utility? What pleases these lovers of toys is not so much the utility, as the aptness of the machines which are fitted to promote it. All their pockets are stuffed with little conveniences. They contrive new pockets, unknown in the clothes of other people, in order to carry a greater number. They walk about loaded with a multitude of baubles, in weight and sometimes in value not inferior to an ordinary Jew's-box, some of which may sometimes be of some little use, but all of which might at all times be very well spared, and of which the whole utility is certainly not worth the fatigue of bearing the burden.

Do you believe in dreams, Uncle Simeon? I do; I believe in nothing else. One night I dreamed that invisible enemies had me tied to a dead cypress. Long red arrows were sticking into me from my head to my feet, and the blood was flowing. On my head they had placed a crown of thorns, and intertwined with the thorns were fiery letters which said: "Saint Blasphemer." I am Saint Blasphemer, Rabbi Simeon. So you'd better not ask me anything else, or I'll start my blasphemies.

Existential envy which is directed against the other person's very nature, is the strongest source of ressentiment. It is as if it whispers continually: "I can forgive everything, but not that you are- that you are what you are-that I am not what you are-indeed that I am not you." This form of envy strips the opponent of his very existence, for this existence as such is felt to be a "pressure," a "reproach," and an unbearable humiliation. In the lives of great men there are always critical periods of instability, in which they alternately envy and try to love those whose merits they cannot but esteem. Only gradually, one of these attitudes will predominate. Here lies the meaning of Goethe's reflection that "against another's great merits, there is no remedy but love."

Soon fades the spell, soon comes the night: Say will it not be then the same, Whether we played the black or white,Whether we lost or won the game?

Don't get involved in partial problems, but always take flight to where there is a free view over the whole single great problem.

It cannot but happen that those individuals whose functions are most out of equilibrium with the modified aggregate of external forces, will be those to die; and that those will survive whose functions happen to be most nearly in equilibrium with the modified aggregate of external forces. But this survival of the fittest, implies multiplication of the fittest. Out of the fittest thus multiplied, there will, as before, be an overthrowing of the moving equilibrium wherever it presents the least opposing force to the new incident force.

There's something about a pious man such as he. He will cheerfully cut your throat if it suits him, but he will hesitate to endanger the welfare of your immaterial and problematical soul.

The true line is not between "hard" natural science and "soft" social sciences, but between precise science limited to highly abstract and simple phenomena in the laboratory and inexact science and technology dealing with complex problems in the real world.

It is better to suffer, than to do, wrong.

I am condemned to be free.

There is no alleviation for the sufferings of mankind except veracity of thought and of action, and the resolute facing of the world as it is, when the garment of make-believe, by which pious hands have hidden its uglier features, is stripped off.

To ignore the true God is in fact only half an evil; atheism is worth more than the piety bestowed on mythical gods.

The standard bearers have grown weak in the defense of their priceless heritage, and the powers of darkness have been strengthened thereby. Weakness of attitude becomes weakness of character; it becomes lack of power to act with courage proportionate to danger. All this must lead to the destruction of our intellectual life unless the danger summons up strong personalities able to fill the lukewarm and discouraged with new strength and resolution.

It is not by prayer and humility that you cause things to go as you wish, but by acquiring a knowledge of natural laws.

When an individual passes from one period of life to another a time comes when he cannot go on in senseless activity and excitement as before, but has to understand that although he has out-grown what before used to direct him, this does not mean that he must live without any reasonable guidance, but rather that he must formulate for himself an understanding of life corresponding to his age, and having elucidated it must be guided by it. And in the same way a similar time must come in the growth and development of humanity.

Religious law makes it illegal for the ignorant to drink wine, but intelligence makes it legal for the intellectual.

Never let your sense of morals prevent you from doing what is right.

Now civilizations, I believe, come to birth and proceed to grow by successfully responding to successive challenges. They break down and go to pieces if and when a challenge confronts them which they fail to meet.

Survival machines that can simulate the future are one jump ahead of survival machines that who can only learn of the basis of trial and error. The trouble with overt trial is that it takes time and energy. The trouble with overt error is that it is often fatal. ...The evolution of the capacity to simulate seems to have culminated in subjective consciousness. Why this should have happened is, to me, the most profound mystery facing modern biology.

The science of pure mathematics, in its modern developments, may claim to be the most original creation of the human spirit.

Bad laws are the worst sort of tyranny.

There was a brief moment after 9/11 when Colin Powell said "we should not rush to satisfy the desire for revenge." It was a great moment, an extraordinary moment, because what he was actually asking people to do was to stay with a sense of grief, mournfulness, and vulnerability.

The introduction of numbers as coordinates by reference to the particular division scheme of the open one dimensional continuum is an act of violence whose only practical vindication is the special calculatory manageability of the ordinary number continuum with its four basic operations. The topological skeleton determines the connectivity of the manifold in the large.

If pains be to be taken to give him a manly air and assurance betimes, it is chiefly as a fence to his virtue when he goes into the world under his own conduct.

Bad company will lead a man to the gallows!

What is a rebel? A man who says no. 

Reason alone does not suffice.

Nature has willed that man should, by himself, produce everything that goes beyond the mechanical ordering of his animal existence, and that he should partake of no other happiness or perfection than that which he himself, independently of instinct, has created by his own reason.

Have we really the right to speak of the cause of a phenomenon?

Injustice, poverty, slavery, ignorance - these may be cured by reform or revolution. But men do not live only by fighting evils. They live by positive goals, individual and collective, a vast variety of them, seldom predictable, at times incompatible.

The law of causality, I believe, like much that passes muster among philosophers, is a relic of a bygone age, surviving, like the monarchy, only because it is erroneously supposed to do no harm.

This I know, that between finite and infinite there is no comparison; so that the difference between God and the greatest and most excellent created thing is no less than the difference between God and the least created thing.

Man consists in Truth. If he exposes Truth, he exposes himself. If he betrays Truth, he betrays himself. We speak not here of lies, but of acting against Conviction.

How it could come to pass I do not know, but I remember it clearly. The dream embraced thousands of years and left in me only a sense of the whole. I only know that I was the cause of their sin and downfall. Like a vile trichina, like a germ of the plague infecting whole kingdoms, so I contaminated all this earth, so happy and sinless before my coming. They learnt to lie, grew fond of lying, and discovered the charm of falsehood.

Useless laws weaken the necessary laws.