“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 ”

“The value of experience is not in seeing much, but in seeing wisely”

“While one finds company in himself and his pursuits, he cannot feel old, no matter what his years may be”

“A mind that is stretched by a new experience can never go back to its old dimensions”

“There is a wisdom of the head, and a wisdom of the heart. ”

“Nine-tenths of wisdom is being wise in time”