Two things awe me most, the starry sky above me and the moral law within me.

Give me matter, and I will construct a world out of it!

After death the soul possesses self-consciousness, otherwise, it would be the subject of spiritual death, which has already been disproved. With this self-consciousness necessarily remains personality and the consciousness of personal identity.

Freedom can never be comprehended, nor even can insight into it be gained.

Act that your principle of action might safely be made a law for the whole world.

All false art, all vain wisdom, lasts its time but finally destroys itself, and its highest culture is also the epoch of its decay.

Nature does nothing in vain, and in the use of means to her goals she is not prodigal.