“Enlightenment is man’s emergence from his self-incurred immaturity.”

Simply to acquiesce in skepticism can never suffice to overcome the restlessness of reason.

Out of the crooked timber of humanity, no straight thing was ever made.

The main point of enlightenment is man’s release from his self-caused immaturity, primarily in matters of religion.

If justice perishes, then it is no longer worthwhile for men to live upon the earth.

From such crooked timber as humanity is made of, no straight thing was ever constructed.

We can never, even by the strictest examination, get completely behind the secret springs of action.

I have therefore found it necessary to deny knowledge, in order to make room for faith.

You must, therefore you can. A free will and a will subject to moral laws are one and the same thing.

All human cognition begins with intuitions, proceeds from thence to conceptions, and ends with ideas.

All so-called moral interest consists simply in respect for the law.

War seems to be ingrained in human nature, and even to be regarded as something noble to which man is inspired by his love of honor, without selfish motives.

Human beings are never to be treated as a means but always as ends.

It is certainly a bad sign of common sense to appeal to it as a witness.

To be is to do.

But only he who, himself enlightened, is not afraid of shadows.

Rules for happiness: something to do, someone to love, something to hope for.

A smile or a tear has no nationality; joy and sorrow speak alike to all nations, and they, above all the confusion of tongues, proclaim the brotherhood of man.

Man cannot discover new oceans unless he has the courage to lose sight of the shore.

The wise man should be prepared for everything that does not lie within his control.

The most important thing my father taught me is that every man has to stand up for his rights.

The ninety and nine are with dreams, content, but the hope of the world made new, is the hundredth man who is grimly bent on making those dreams come true.

Tis hard to fight with anger, but the prudent man keeps it under control.

Poetry is the moment when the man is in conservation with God.

Trees, though they are cut and lopped, grow up again quickly, but if men are destroyed, it is not easy to get them again.