“The man who learns but does not think is lost. The man who thinks but does not learn is in great danger.” — Confucius · Analects, 2.15
“A frog in a well does not know the great sea.” — Japanese Proverb · I no naka no kawazu taikai wo shirazu
“Better is a poor and wise youth than an old and foolish king who no longer knows how to take advice.” — Ecclesiastes 4:13 · Book of Ecclesiastes, Hebrew Bible
“Gray hair is a crown of glory; it is gained in a righteous life.” — Proverbs 16:31 · Book of Proverbs, Hebrew Bible