“Act only according to that maxim whereby you can at the same time will that it should become a universal law.”

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.

Things which as effects presuppose others as causes cannot be reciprocally at the same time causes of these.

Freedom, is a property of all rational beings.

Nature is beautiful because it looks like Art; and Art can only be called beautiful if we are conscious of it as Art while yet it looks like Nature.

Difficulties are opportunities to better things; they are stepping-stones to greater experience, When one door closes, another always opens; as a natural law it has to, to balance.

We are bound by the law, so that we may be free.

It is no disgrace but honorable rather to steal, except such things as the law forbids.

In times of war, the law falls silent.

The closer the collapse of the Empire, the crazier its laws are.

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

Weakness’ is weakness only in light of the aims man sets for himself, the instruments at his disposal and the laws he imposes.

Two things fill the mind with ever-increasing wonder and awe, the more often and the more intensely the mind of thought is drawn to them: the starry heavens above me and the moral law within me.