But when he says, I will watch to see, he refers to perseverance; for it is not enough to open our eyes once, and by one look to observe what happens to us; but it is necessary to continue our attention. This constant attention is, then, what the Prophet means by watching; for we are not so clear-sighted as immediately to comprehend what is useful to be known. And then, though we may once see what is necessary, yet a new temptation can obliterate that view. It thus happens, that all our observations become evanescent, except we continue to watch, that is, except we persevere in our attention, so that we may ever return to God, whenever the devil raises new storms, and whenever he darkens the heavens with clouds to prevent us to see God. We hence see how emphatical is what the Prophet says here, I will watch to see. The Prophet evidently compares the faithful to watchmen, who, though they hear nothing, yet do not sleep; and if they hear any noise once or twice, they do not immediately sound an alarm, but wait and attend. As, then, they who keep watch ought to remain quiet, that they may not disturb others, and that they may duly perform their office; so it behaves the faithful to be also tranquil and quiet, and wait patiently for God during times of perplexity and confusion.