“A crisis is a terrible thing to waste.”~ Multiple sources, including article title by Paul S. Keim in the journal, Science (2007)
“What does not kill me, makes me stronger.”~Friedrich Nietzsche, Twilight of the Idols (1895) Maxim #8 
“Many of life's failures are men who did not realize how close they were to success when they gave up.” ~Thomas Edison
“Old habits die hard - if you don't kick them, they kick you.”~Donald Westlake (nom de plume, "Richard Stark"), The Hunter. Recited by Payback (1999) narrator after watching his wife stumble home in a drugged state.
“If we possess our why of life, we can put up with almost any how.”~Friedrich Nietzsche, Twilight of the Idols (1895) Maxim #12 Translated by R. J. Hollingdale, Penguin Books, Baltimore, 1968, p. 23)
“When a trout rising to a fly gets hooked on a line and finds himself unable to swim about freely, he begins with a fight which results in struggles and splashes and sometimes an escape. Often, of course, the situation is too tough for him.... In the same way the human being struggles with his environment and with the hooks that catch him. Sometimes he masters his difficulties; sometimes they are too much for him. His struggles are all that the world sees and it naturally misunderstands them. It is hard for a free fish to understand what is happening to a hooked one.”~Karl A. Menninger
“The educated person is not the person who can answer the questions, but the person who can question the answers.”~T. Schick Jr.
“Humans have an instinct for creativity and a moral instinct. A good educational system ought to ... allow them to flourish. But of course that has problems... it means that you will encourage challenge of authority and domination. It will encourage questioning of powerful institutions. So schools actually ... filter out independence of thought, creativity, imagination, and in their place foster obedience and subordination.”~Noam Chomsky