What Life Half Gives A Man, Posterity

I Let Everyone Follow His Own Bent, That I May Be Free To Follow Mine.

Happy Contractedness Of Youth, Nay, Of Mankind In General, That They Think Neither Of The High Nor The Deep, Of The True Nor The False, But Only Of What Is Suited To Their Own Conceptions.

The Words You've Bandied Are Sufficient; 'tis Deeds That I Prefer To See. [ger., Der Worte Sind Genug Gewechselt, Lasst Mich Auch Endlich Thaten Sehn.]

Science Has Been Seriously Retarded By The Study Of What Is Not Worth Knowing And Of What Is Not Knowable.

Progress Has Not Followed A Straight Ascending Line, But A Spiral With Rhythms Of Progress And Retrogression, Of Evolution And Dissolution.