I the LORD search the heart, I test the mind, even to give every man according to his ways, and according to the fruit of his doings.
All Commentaries on Jeremiah 17:10 Go To Jeremiah 17
John Chrysostom
AD 407
That it belongs to God alone to know people’s secrets, hear what the prophet says: “You alone know the heart,” and again, “God examines the heart and the seat of emotions,” and Jeremiah, too, says, “The heart is inscrutable above all things, and he is man, and who shall know him?” and, “People shall look on the face but God on the heart.”