Proverbs 27:17-20

¹⁷Iron is sharpened by iron: so doth a man sharpen himself on the countenance of his friend.

¹⁸Whoso guardeth the fig-tree will eat its fruit: so he that watcheth over his master will be honored.

¹⁹As the water showeth to the face the reflected face: so doth the heart of man show itself to man.

²⁰The nether world and the place of corruption are never satisfied: so are the eyes of man never satisfied.