The first sign of senility is that a man forgets his theorems, the second sign is that he forgets to zip up, the third sign is that he forgets to zip down.
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Attributed in Paul Hoffman, The Man Who Loved Only Numbers: The Story of Paul Erdős and the Search for Mathematical Truth (1998)
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This has also been attributed, with variants, to Paul Erdős, who repeated the remark.Stanislaw Ulam
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When someone forgets himself, this by no means makes him altruistic; when a thinking person forgets himself, he immediately also forgets his fellowman, he loses himself and his humanity by becoming engrossed in his subject. Thus he is in a sense more contemplative than a feeling person.
M. C. Escher
There runs a strange law through the length of human history — that men are continually tending to undervalue their environment, to undervalue their happiness, to undervalue themselves. The great sin of mankind, the sin typified by the fall of Adam, is the tendency, not towards pride, but towards this weird and horrible humility.
This is the great fall, the fall by which the fish forgets the sea, the ox forgets the meadow, the clerk forgets the city, every man forgets his environment and, in the fullest and most literal sense, forgets himself. This is the real fall of Adam, and it is a spiritual fall. It is a strange thing that many truly spiritual men, such as General Gordon, have actually spent some hours in speculating upon the precise location of the Garden of Eden. Most probably we are in Eden still. It is only our eyes that have changed.Gilbert Keith Chesterton
Strength is the sign of vigor, the sign of life, the sign of hope, the sign of health, and the sign of everything that is good. As long as the body lives, there must be strength in the body, strength in the mind, strength in the hand.
Swami Vivekananda
Man forgets. God forgives. Man forgets God's Truth. God forgives man's ignorance.
Sri Chinmoy
Ulam, Stanislaw
Ulbricht, Walter
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