(7.) The angel gives him a sign in and by that which he had kindly prepared for his entertainment. For what we offer to God for his glory, and in token of our gratitude to him, will be made by the grace of God to turn to our own comfort and satisfaction. The angel ordered him to take the flesh and bread out of the basket, and lay it upon a hard and cold rock, and to pour out the broth upon it, which, if he brought it hot, would soon be cold there; and Gideon did so (v. 20), believing that the angel appointed it, not in contempt of his courtesy, but with an intention to give him a sign, which he did, abundantly to his satisfaction. For, [1.] He turned the meat into an offering made by fire, of a sweet savour unto himself, showing hereby that he was not a man who needed meat, but the Son of God who was to be served and honoured by sacrifice, and who in the fulness of time was to make himself a sacrifice. [2.] He brought fire out of the rock, to consume this sacrifice, summoning it, not by striking the rock, as we strike fire out of a flint, but by a gentle touch given to the offering with the end of his staff, v. 21. Hereby he gave him a sign that he had found grace in his sight, for God testified his acceptance of sacrifices by kindling them, if public, with fire from heaven, as those of Moses and Elias, if private, as this, with fire out of the earth, which was equivalent: both were the effect of divine power; and this acceptance of his sacrifice evidenced the acceptance of his person, confirmed his commission, and perhaps was intended to signify his success in the execution of it, that he and his army should be a surprising terror and consumption to the Midianites, like this fire out of the rock. [3.] He departed out of his sight immediately, did not walk off as a man, but vanished and disappeared as a spirit. Here was as much of a sign as he could wish.