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 - a poetical figure, meaning, 'He will preserve them from error or sin.'
And the wicked shall be silent in darkness - i:e., when reduced to misery, they will see in their degradation a punishment of their misdeeds, and in silent submission own the justice of the divine dispensation. [The Septuagint substitutes for this clause the following:-didous eucheen too euchomenoo, kai eulogeesen etee dikaiou, giving the object of his petition to him that prayeth, He also blessed the years of a righteous man.]