“If we knew what it was we were doing, it would not be called research, would it?”
“There does, in fact, appear to be a plan.”
“On the left-hand side of the field equation we may add the fundamental tensor guv, multiplied by a universal constant, -λ, at present unknown, without destroying the general covariance.”
“Since I have introduced this term I had always a bad conscience. . . . I cannot help to feel it strongly and I am unable to believe that such an ugly thing should be realized in nature.”
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