Act In Such A Way That You

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

Each According To His Own Way Of Seeing Things, Seek One Goal, That Is Gratification.

If, Like Hume, I Had All Manner Of Adornment In My Power, I Would Still Have Reservations About Using Them. It Is True That Some Readers Will Be Scared Off By Dryness. But Isn't It Necessary To Scare Off Some If In Their Case The Matter Would End Up In Bad Hands?

Science Is Organized Knowledge. Wisdom Is Organized Life.

Cruelty To Animals Is Contrary To Man's Duty To Himself, Because It Deadens In Him The Feeling Of Sympathy For Their Sufferings, And Thus A Natural Tendency That Is Very Useful To Morality In Relation To Other Human Beings Is Weakened.