Natural Science Physics Contains In Itself Synthetical

It Is Not Necessary That Whilst I Live I Live Happily; But It Is Necessary That So Long As I Live I Should Live Honourably.

Have The Courage To Use Your Own Reason- That Is The Motto Of Enlightenment. "foundations Of The Metaphysics Of Morals" (1785)

Reason In A Creature Is A Faculty Of Widening The Rules And Purposes Of The Use Of All Its Powers Far Beyond Natural Instinct; It Acknowledges No Limits To Its Projects. Reason Itself Does Not Work Instinctively, But Requires Trial, Practice, And Instruction In Order Gradually To Progress From One Level Of Insight To Another.

Christianity Possesses The Great Advantage Over Judaism Of Being Represented As Coming From The Mouth Of The First Teacher Not As A Statutory But As A Moral Religion, And As Thus Entering Into The Closest Relation With Reason So That, Through Reason, It Was Able Of Itself, Without Historical Learning, To Be Spread At All Times And Among All Peoples With The Greatest Trustworthiness.

There Is Something Splendid About Innocence; But What Is Bad About It, In Turn, Is That It Cannot Protect Itself Very Well And Is Easily Seduced.