Abraham is now in a fit moral position to have his heart put to a most severe test. The long-cherished reserve being put forth from his heart, in Chap. xx.--the bond-woman and her son being put forth from his house, as in Chap. xxi., he now stands forth in the most honored position in which any soul can be placed, and that is a position of trial from the hand of God himself. There are various kinds of trial: trial from the hand of Satan; trial from surrounding circumstances; but the highest character of trial is that which comes directly from the hand of God, when he puts his dear child into the furnace for the purpose of testing the reality of his faith. God will do this: he must have reality. It will not do to say, "Lord, Lord," or, "I go, sir." The heart must be probed to the very bottom, in order that no element of hypocrisy or false profession may be allowed to lodge there. "My son, give me _thine heart_." He does not say, "Give me thine head, or thine intellect, or thy talents, or thy tongue, or thy money;" but "Give me thine heart:" and in order to prove the sincerity of our response to this gracious command, he will lay his hand upon something very near our hearts. Thus he says to Abraham, "Take now thy son, thine only son Isaac, whom thou lovest, and get thee into the land of Moriah, and offer him there for a burnt-offering, upon one of the mountains which I will tell thee of." This was coming very close to Abraham's heart. It was passing him through a searching crucible indeed. God "requires truth in the inward parts." There may be much truth on the lips, and much in the intellect, but God looks for it in the heart. It is no ordinary proof that will satisfy God, as to the love of our hearts. He himself did not rest satisfied with giving an ordinary proof. He gave his Son, and we should aim at giving very striking proofs of our love to him who so loved us, even when we were dead in trespasses and sins.