Opening sentence of his "underground colloquium" in March 1983, as quoted by Nicolas Gisin in "Quantum [un]speakables: from Bell to quantum information", p. 199, 2002.

Remark made during a week at Princeton beginning 9 May 1921, later carved above the fireplace of the Common Room of Fine Hall (the Mathematical Institute), Princeton University - in R. W. Clark Einstein (1973) ch. 14