Proverbs 27:19 in the World English Bible
Like water reflects a face, so a man’s heart reflects the man.
Context
18 Whoso keepeth the fig tree shall eat the fruit thereof: so he that waiteth on his master shall be honoured.
19 As in water face answereth to face, so the heart of man to man.
20 Hell and destruction are never full; so the eyes of man are never satisfied.