Proverbs 14:10 (BSB)

The heart knows its own bitterness, and no stranger shares in its joy.

From Proverbs 14. Also in the ESV.

Commentary on Proverbs 14:10

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Proverbs 14:10: This agrees with Co1 2:11, What man knows the things of a man, and the changes of his temper, save the spirit of a man? 1. Every man feels most from his own burden, especially that which is a burden upon the spirits, for that is commonly concealed and the sufferer keeps it to himself.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Proverbs 14:10: The heart knoweth his own bitterness,.... Or "the bitterness of his soul" (l), the distress of his conscience, the anguish of his mind; the heart of man only knows the whole of it; something of it may be known to others by his looks, his words, and gestures, but not all of it; see Co1 2:10; bitterness of soul often arises from outward troubles, pains...
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Proverbs 14:10: Each one best knows his own sorrows or joys.
• Geneva Bible Notes (Reformed), Geneva Bible Study Notes on Proverbs 14:10: The heart knoweth its own bitterness; and a stranger doth not intermeddle with its joy. (g) As a man's conscience is witness to his own grief, so another cannot feel the joy and comfort which a man feels in himself.