One Is Not Rich By What One

All Human Knowledge Begins With Intuitions, Proceeds From Thence To Concepts, And Ends With Ideas.

It Is Precisely In Knowing Its Limits That Philosophy Consists.

Man's Greatest Concern Is To Know How He Shall Properly Fill His Place In The Universe And Correctly Understand What He Must Be In Order To Be A Man.

Is It Reasonable To Assume A Purposiveness In All The Parts Of Nature And To Deny It To The Whole?

Act So As To Use Humanity, Yourself And Others, Always As An End And Never As A Means To An End.