There Are Things That Are So Serious

It Was About Three O'clock At Night When The Final Result Of The Calculation [which Gave Birth To Quantum Mechanics] Lay Before Me ... At First I Was Deeply Shaken ... I Was So Excited That I Could Not Think Of Sleep. So I Left The House ... And Awaited The Sunrise On Top Of A Rock.

In My Paper The Fact The Xy Was Not Equal To Yx Was Very Disagreeable To Me. I Felt This Was The Only Point Of Difficulty In The Whole Scheme...and I Was Not Able To Solve It.

What We Observe Is Not Nature Itself, But Nature Exposed To Our Method Of Questioning.

Even For The Physicist The Description In Plain Language Will Be A Criterion Of The Degree Of Understanding That Has Been Reached.

"uncertainty" Is Not "i Don't Know." It Is "i Can't Know." "i Am Uncertain" Does Not Mean "i Could Be Certain."