Einstein with Robert Oppenheimer

Albert Einstein
(* 14. März 1879 in Ulm, Königreich Württemberg; † 18. April 1955 in Princeton, New Jersey)

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"All knowledge of reality starts from experience and ends in it. Propositions arrived at by purely logical means are completely empty as regards reality. Because Galileo saw this, and particularly because he drummed it into the scientific world, he is the father of modern physics – indeed, of modern science altogether."

Albert Einstein (2009) [1934]. "On the Method of Theoretical Physics". Einstein's essays in science. Translated by Alan Harris. Dover. pp. 12–21. ISBN 9780486470115.