O My Brothers, Am I Then Cruel?

Science ... Has No Consideration For Ultimate Purposes, Any More Than Nature Has, But Just As The Latter Occasionally Achieves Things Of The Greatest Suitableness Without Intending To Do So, So Also True Science, As The Imitator Of Nature In Ideas, Will Occasionally And In Many Ways Further The Usefulness And Welfare Of Man,-but Also Without Intending To Do So.

On Every Parable You Ride To Every Truth.

So Far No One Had Had Enough Courage And Intelligence To Reveal Me To My Dear Germans. My Problems Are New, My Psychological Horizon Frighteningly Comprehensive, My Language Bold And Clear; There May Well Be No Books Written In German Which Are Richer In Ideas And More Independent Than Mine.

A Married Philosopher Belongs To Comedy.

One Sticks To An Opinion Because He Prides Himself On Having Come To It On His Own, And Another Because He Has Taken Great Pains To Learn It And Is Proud To Have Grasped It: And So Both Do So Out Of Vanity.