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.

Henry Ford

Henry Ford (July 30, 1863 – April 7, 1947) was the American founder of the Ford Motor Company and father of modern assembly lines used in mass production.

Ecclesiastes 11:9 (New American Standard Bible)

9Rejoice, young man, during your childhood, and let your heart be pleasant during the days of young manhood.

And follow the impulses of your heart and the desires of your eyes Yet know that God will bring you to judgment for all these things.