Stanislaw Ulam Quotes about Mathematics

"The Dreams of Reason: The Computer and the Rise of the Sciences of Complexity". Book by Heinz Pagels. Chapter 3, p. 94, 1988.
"Adventures of a Mathematician". Book by Stanislaw Ulam, 3rd edition. Chapter 15: "Random Reflections on Mathematics and Science", p. 273-274, 1991.
"Adventures of a Mathematician". Book by Stanislaw Ulam, 3rd edition. Chapter 6: "Transition And Crisis", p. 120, 1991.
"Adventures of a Mathematician" by Stanislaw Ulam, Third Edition, (p. 52), 1991.
"Adventures of a Mathematician" by Stanislaw Ulam, Third Edition, (p. 222), 1991.