Proverbs 14:10 in the King James Version
The heart knoweth his own bitterness; and a stranger doth not intermeddle with his joy.
Context
9 Fools mock at making atonement for sins, but among the upright there is good will.
10 The heart knows its own bitterness and joy; he will not share these with a stranger.
11 The house of the wicked will be overthrown, but the tent of the upright will flourish.