The highest person is he who is of most use to humankind.
He who guards his secrets retains control in his own hands
The world is darkness; knowledge is light; but knowledge without truth is a mere shadow.
Man comes from a drop of semen and leaves as a piece of dust. He doesn't know when he came and he doesn't know when he's leaving, yet he walks on the earth thinking he knows everything.
Many a spoken word is more piercing than an attack.
If you are greeted then return the greetings more warmly. If you are favored, then repay the obligation manifold; but he who takes the initiative will always excel in merit.