This verse stands connected with the last, for the Prophet means to show that nothing is better than to rely on God’s word, how much soever may various temptations assault our souls. We hence see that nothing new is said here, but that the former doctrine is confirmed—that our salvation is rendered safe and certain through God’s promise alone, and that therefore we ought not to seek any other haven, where we might securely sustain all the onsets of Satan and of the world. But he sets the two clauses the one opposed to the other: every man who would fortify himself would ever be subject to various changes, and never attain a quiet mind; then comes the other clause—that man cannot otherwise obtain rest than by faith.