“Anyone who stops learning is old, whether at twenty or eighty. Anyone who keeps learning stays young. The greatest thing in life is to keep your mind young.”

“None are so old as those who have outlived enthusiasm.”

“You can’t help getting older, but you don’t have to get old.”

“We don’t stop playing because we grow old; we grow old because we stopped playing.”

“Years may wrinkle the skin, but to give up interest wrinkles the soul. You are as young as your faith, as old as your doubt; as young as your self-confidence, as old as your fear; as young as your hope as old as you despair.”

“The aging process has you firmly in its grasp if you never get the urge to throw a snowball.”