Teach Principles Not Formulas.

The First Principle Is That You Must Not Fool Yourself—and You Are The Easiest Person To Fool. So You Have To Be Very Careful About That. After You’ve Not Fooled Yourself, It’s Easy Not To Fool Other Scientists. You Just Have To Be Honest In A Conventional Way After That.

You Do Not Know Anything Until You Have Practiced.

Physics Is To Mathematics What Sex Is To Masturbation.

We Can Deduce, Often, From One Part Of Physics Like The Law Of Gravitation, A Principle Which Turns Out To Be Much More Valid Than The Derivation.

I'm Smart Enough To Know That I'm Dumb.