Statements by Einstein from Essays Presented toon the Occasion of His Eightieth Birthday (1954), p. 26; Baeck's birthday was 23 May 1953; Einstein Archives 28-962. Some quotes are from The New Quotable Einstein (2005) edited by Alice Calaprice, pp. 120-121, others from Ideas and Opinions by Albert Einstein (1954), where they appear in the section "Aphorisms for Leo Baeck."

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