He will keep the feet of his saints, and the wicked shall be silent in darkness; for by strength shall no man prevail. He will keep the feet of his saints - He will order and direct all their goings, and keep them from every evil way.
The wicked shall be silent in darkness - The Targum understands this of their being sent to the darkness of hell; they shall be slain.
By strength shall no man prevail - Because God is omnipotent, and no power can be successfully exerted against him.