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

Look closely. The beautiful may be small.

All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason.

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

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

Genius is the ability to independently arrive at and understand concepts that would normally have to be taught by another person.

Every human being should always be treated as an end and never as a mere instrument.