It Is Difficult To Predict,

A Visitor To Niels Bohr's Country Cottage, Noticing A Horseshoe Hanging On The Wall, Teasing The Eminent Scientist About This Ancient Superstition. "can It Be True That You, Of All People, Believe It Will Bring You Luck?' 'of Course Not,' Replied Bohr, 'but I Understand It Brings You Luck Whether You Believe It Or Not.'

The Very Nature Of The Quantum Theory ... Forces Us To Regard The Space-time Coordination And The Claim Of Causality, The Union Of Which Characterizes The Classical Theories, As Complementary But Exclusive Features Of The Description, Symbolizing The Idealization Of Observation And Description, Respectively.

Never Express Yourself More Clearly Than You Are Able To Think.

If You Aren't Confused By Quantum Mechanics, You Haven't Really Understood It.

Nothing Exists Until It Is Measured.