From whatever side the matter is regarded, it is always found that reason confronts our longing for personal immortality and contradicts it. And the truth is, in all strictness, that reason is the enemy of life.

There are questions which, once approached, either isolate you or kill you outright.

It has been observed that missiles and projectiles describe a curved path of some sort; however no one has pointed out the fact that this path is a parabola. But this and other facts, not few in number or less worth knowing, I have succeeded in proving; and what I consider more important, there have been opened up to this vast and most excellent science, of which my work is merely the beginning, ways and means by which other minds more acute than mine will explore its remote corners.

In old days the plastic arts, music, and poesy were so germane to man in his totality that his Transcendence plainly manifest in them. ... What is to-day obvious to all is a decay in the essence of art. ... the opposition to man's true nature as man.

He marveled at the strange blindness by which men, though they are so alert to what changes in themselves, impose on their friends an image chosen for them once and for all. He was being judged by what he had been. Just as dogs don't change character, men are dogs to one another.

That fear which gives birth to thoughts, and the fear of thoughts...

In spite of the universalistic spirit of the monotheistic Western religions and of the progressive political concepts that are expressed in the idea "that all men are created equal," love for mankind has not become a common experience. Love for mankind is looked upon as an achievement which, at best, follows love for an individual or as an abstract concept to be realized only in the future. But love for man cannot be separated from love for one individual. To love one person productively means to be related to his human core, to him as representing mankind. Love for one individual, in so far as it is divorced from love for man, can refer only to the superficial and to the accidental; of necessity it remains shallow.

The most important part of education - to teach the meaning of to know (in the scientific sense). The last statement in her notebook

No one gets angry at a mathematician or a physicist whom he or she doesn't understand at all, or at someone who speaks a foreign language, but rather at someone who tampers with your own language, with this 'relation,' precisely, which is yours.

Misfortune shows those who are not really friends.

Is there any knowledge in the world which is so certain that no reasonable man could doubt it?

We wish, in a word, equality - equality in fact as a corollary, or rather, as primordial condition of liberty. From each according to his faculties, to each according to his needs; that is what we wish sincerely and energetically.

On our earth we can only love with suffering and through suffering. We cannot love otherwise, and we know of no other sort of love. I want suffering in order to love. I long, I thirst, this very instant, to kiss with tears the earth that I have left, and I don't want, I won't accept life on any other!"

There is no cure for birth and death save to enjoy the interval.

A propensity to hope and joy is real riches: One to fear and sorrow, real poverty.

I never read a book before reviewing it: it prejudices a man so.

Color is not so much a visual as a tactile medium.

Nature shrinks as capital grows. The growth of the market cannot solve the very crisis it creates.

All right, men are as they should be, can be. What should they be? Surely not more than they can be! And what can they be? Not more, again, than they - can, than they have the competence, the force, to be. But this they really are, because what they are not, they are incapable of being; for to be capable means - really to be. One is not capable for anything that one really is not; one is not capable of anything that one does not really do. Could a man blinded by cataract see? Oh, yes, if he had his cataract successfully removed. But now he cannot see because he does not see. Possibility and reality always coincide. One can do nothing that one does not, as one does nothing that one cannot.

Some impose upon the world that they believe that which they do not; others, more in number, make themselves believe that they believe, not being able to penetrate into what it is to believe.

Time, and Industry, produce everyday new knowledge.

I've always written at the top of my lungs and from some secret motives within. I have followed the advice of my good friend Federico Fellini who, when asked about his work, said, "Don't tell me what I'm doing, I don't want to know."

By means of the new education we want to mould the Germans into a corporate body, which shall be stimulated and animated in all its individual members by the same interest.

Kant was also quite aware that "the urgent need" of reason is both different from and "more than mere quest and desire for knowledge." Hence, the distinguishing of the two faculties, reason and intellect, coincides with a distinction between two altogether different mental activities, thinking and knowing.

All philosophical sects have run aground on the reef of moral and physical ill. It only remains for us to confess that God, having acted for the best, had not been able to do better.

People think they have taken quite an extraordinarily bold step forward when they have rid themselves of belief in hereditary monarchy and swear by the democratic republic. In reality, however, the state is nothing but a machine for the oppression of one class by another, and indeed in the democratic republic no less than in the monarchy.

In erotic love, two people who were separate become one. In motherly love, two people who were one become separate. The mother must not only tolerate, she must wish and support the child's separation.

For man holds his ground only by surpassing himself, in the same sense in which it is said that one ceases to love if one does not love increasingly everyday.

Psychoanalysis, which interprets the human being as a socialized being, and the psychic apparatus as essentially developed and determined through the relationship of the individual to society, must consider it a duty to participate in the investigation of sociological problems to the extent the human being or his/her psyche plays any part at all.

One cannot demand of a scholar that he show himself a scholar everywhere in society, but the whole tenor of his behavior must none the less betray the thinker, he must always be instructive, his way of judging a thing must even in the smallest matters be such that people can see what it will amount to when, quietly and self-collected, he puts this power to scholarly use.

Communism... is the genuine resolution of the antagonism between man and nature and between man and man; it is the true resolution of the conflict between existence and essence, objectification and self-affirmation, freedom and necessity, individual and species. It is the riddle of history solved and knows itself as the solution.

A right exists in theory... All human beings have the same set of rights, but rights need to be enforced by the state. It needs to rely on the coercive power of the state... its army, its police force, to actually make those rights something real that citizens can enjoy, and the enforcement power is not universal. ...We wouldn't want to live in a world in which every liberal state wanted to enforce liberal rights in every other state in the world.

It is proof of a base and low mind for one to wish to think with the masses or majority, merely because the majority is the majority. Truth does not change because it is, or is not, believed by a majority of the people.

Unfortunately not only were the rulers, who were considered supernatural beings, benefited by having the peoples in subjection, but as a result of the belief in, and during the rule of, these pseudodivine beings, ever larger and larger circles of people grouped and established themselves around them, and under an appearance of governing took advantage of the people. And when the old deception of a supernatural and God-appointed authority had dwindled away these men were only concerned to devise a new one which like its predecessor should make it possible to hold the people in bondage to a limited number of rulers.

The logical picture of the facts is the thought.

What place do we occupy in the "universe"? A point, if that! Why reproach ourselves when we are evidently so insignificant? Once we make this observation, we grow calm at once: henceforth, no more bother, no more frenzy, metaphysical or otherwise. And then that point dilates, swells, substitutes itself for space. And everything begins all over again.

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

What should we gain by a definition, as it can only lead us to other undefined terms?

The gods sell anything to everybody at a fair price.

Erect I make a resolution; prone I revoke it.

It must not be supposed that this conflict is, on the part of the Teuton, aggressive in substance, whatever it may be in form. In substance it is defensive, the attempt to preserve Central Europe for a type of civilisation indubitably higher and of more value to mankind than that of any Slav State. The existence of the Russian menace on the Eastern border is, quite legitimately, a nightmare to Germany.

The intellectual's spirit as an amateur can enter and transform the merely professional routine most of us go through into something much more lively and radical; instead of doing what one is supposed to do one can ask why one does it, who benefits from it, how can it reconnect with a personal project and original thoughts.

Proverbs are always platitudes until you have personally experienced the truth of them.

Born in a prison, with burdens on our shoulders and our thoughts, we could not reach the end of a single day if the possibilities of ending it all did not incite us to begin the next day all over again.

Time passes quickly with lovers.