At 15 I set my heart on learning; At 30 I firmly took my stand; At 40 I had no delusions; At 50 I knew the Mandate of Heaven; At 60 my ear was attuned; At 70 I followed my heart's desire without overstepping the boundaries of right.
Every piece of marble has a statue in it waiting to be released by a person of sufficient skill to chip away the unnecessary parts. Just as the sculptor is to the marble, so is education to the soul. It releases it. For only educated people are free people. You cannot create a statue by smashing the marble with a hammer, and you cannot by the force of arms release the spirit or the soul of people.
Yin and yang, male and female, strong and weak, rigid and tender, heaven and earth, light and darkness, thunder and lightning, cold and warmth, good and evil...the interplay of opposite principles constitutes the universe.