John Wesley on Psalms 40:4

The proud - Or, the mighty, the great and proud potentates of the world, to whom most men are apt to look and trust. Turn - From God, in whom alone they ought to trust. To lies - To lying vanities, such as worldly power and wisdom, and riches, and all other earthly things, or persons, in which men are prone to trust: which are called lies, because they promise more than they perform.