It Is Not Enough To Be Wrong,

Anybody Who Is Not Shocked By This Subject Has Failed To Understand It. [of Quantum Mechanics]

We Are All Agreed That Your Theory Is Crazy. The Question Which Divides Us Is Whether It Is Crazy Enough To Have A Chance Of Being Correct. My Own Feeling Is That It Is Not Crazy Enough.

One Must Always Do What One Really Cannot.

If Quantum Mechanics Hasn't Profoundly Shocked You, You Haven't Understood It Yet.

In Physics We Deal With States Of Affairs Much Simpler Than Those Of Psychology And Yet We Again And Again Learn That Our Task Is Not To Investigate The Essence Of Things-we Do Not At All Know What This Would Mean&mash;but To Develop Those Concepts That Allow Us To Speak With Each Other About The Events Of Nature In A Fruitful Manner.