Behold, the eye of the Lord is upon them that fear him - He watches over them, and “he” guards them from danger. His eye is, in fact, upon all men; but it is directed with special attention to those who fear him and trust in him. Their security is in the fact that the eye of God is upon them; that he knows their wants; that he sees their dangers; that he has ample ability to deliver and save them.
Upon them that hope in his mercy - Upon the pious; upon his friends. The expression is a very beautiful one. It describes the true state of a pious heart; it in fact characterizes the whole of religion, for we imply all that there is in religion on earth when we say of a man, that - conscious of his weakness and sinfulness - “he hopes in the mercy of God.”