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