Genesis 22:12

And he said, Lay not thine hand upon the lad, neither do thou anything unto him; for now I know that thou fearest God, seeing thou hast not withheld thy son, thine only son, from Me. The Angel of the Lord in the special sense of the word, the Son of God, is here again in evidence, interfering just in time to save the life of Isaac. God had now, by the most severe test which could have been devised, obtained evidence, made manifest by evident proof, discovered by actual experiment, that fearing God Abraham was, that this was the attitude of his mind and heart, since he had not spared even his only son for the sake of his obedience to God. Here also the type of Isaac as foreshadowing the greater sacrifice of the New Testament is emphasized, Romans 8:32.