John Gill - Exposition
John Gill
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 1 Corinthians 2:10; bitterness of soul often arises from outward troubles, pains, and diseases of body, losses,...