The enjoyment of power inevitably corrupts the judgment of reason, and perverts its liberty.

There is no virtue in penance and fasting which waste the body; they are only fanatical and monkish.

Philosophy stands in need of a science which shall determine the possibility, principles, and extent of human knowledge à priori.

I assert that, in any particular natural science, one encounters genuine scientific substance only to the extent that mathematics is present.

Thoughts without content are empty, intuitions without concepts are blind... The understanding can intuit nothing, the senses can think nothing. Only through their union can knowledge arise.

Have the courage to use your own reason- That is the motto of enlightenment. "Foundations of the Metaphysics of Morals" (1785)

Look closely. The beautiful may be small.