Seek not the favor of the multitude; it is seldom got by honest and lawful means. But seek the testimony of few; and number not voices, but weigh them.

Thoughts without content are empty, intuitions without concepts are blind.

Art is purposiveness without purpose.

Space and time are the framework within which the mind is constrained to construct its experience of reality.

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

Always treat people as ends in themselves, never as means to an end.

It is often necessary to make a decision on the basis of knowledge sufficient for action but insufficient to satisfy the intellect.