Who said “Man is not made for defeat.”?

“One's prime is elusive. You little girls, when you grow up, must be on the alert to recognize your prime at whatever time of your life it may occur. You must then live it to the full.”

“Our being is subject to all the chances of life. There are so many things we are capable of, that we could be or do. The potentialities are so great that we never, any of us, are more than one-fourth fulfilled.”

“What you can become you are already.”

“Man is as full of potential as he is of importance.”

“The greatest quest in life is to reach one's potential.”

“A man can be destroyed but not defeated.”

“All our words from loose using have lost their edge.”

“Hesitation increases in relation to risk in equal proportion to age.”

“A man's got to take a lot of punishment to write a really funny book.”

“We are all apprentices in a craft where no one ever becomes a master.”

“Prose is architecture, not interior decoration, and the Baroque is over.”