Solomon
Proverbs 19:21KJV·traditional attribution

There are many devices in a man’s heart; nevertheless the counsel of the LORD, that shall stand.

Matthew Henry Presbyterian

Here we have, 1. Men projecting. They keep their designs to themselves, but they cannot hide them from God; he knows the many devices that are in men's hearts, - devices against his counsels (as those, Psa 2:1-3; Mic 4:11), - devices without his counsel (no regard had to his providence, as those Jam 4:13, this and the other they will do, and not take...

John Gill Reformed Baptist

There are many devices in a man's heart,.... Some about civil things; to get wealth and riches: to obtain honour and glory among men; to attain to a long life, and to perpetuate their memories after death: some about sinful things; to gratify their carnal lusts and sensual appetites; and to do mischief to others, particularly the people of God, and the cause and interest...

Jamieson-Fausset-Brown Reformed

(Compare Pro 16:1, Pro 16:9; Psa 33:10-11). The failure of man's devices is implied.