Who said “Years may wrinkle the skin, but to give up enthusiasm wrinkles the soul. Worry, fear,…”?

“Wrecked on the lee shore of age.”

“No wise man ever wished to be younger.”

“Old age is an insult. It's like being smacked.”

“Be wise with speed; a fool at forty is a fool indeed.”

“There's no such thing as old age, there is only sorrow.”

“Nobody grows old merely by living a number of years. We grow old by deserting our ideals.”

“Youth is not a time of life; it is a state of mind; it is not a matter of rosy cheeks, red lips and supple knees; it is a matter of the will, quality of the imagination, a vigor of the emotions; it is the freshness of the deep springs of life.”

“When the aerials are down, and your spirit is covered with snows of cynicism and the ice of pessimism, then you are grown old, even at twenty, but as long as your aerials are up, to catch the waves of optimism, there is hope you may die young at eighty.”

“Whether sixty or sixteen, there is in every human being's heart the lure of wonder, the unfailing child-like appetite of what's next, and the joy of the game of living. In the center of your heart and my heart there is a wireless station; so long as it receives messages of beauty, hope, cheer, courage and power from men and from the infinite, so long are you young.”