John Wesley on Exodus 3:4

When the Lord saw that he turned aside to see it, God called to him - If he had carelessly neglected it, it is likely God had departed and said nothing to him. God called and said, Moses, Moses - This which he heard could not but surprise him much more than what he saw. Divine calls are then effectual, when the spirit of God makes them particular, and calls us as by name. The Word calls, Ho, every one; the Spirit, by the application of that, calls, Ho, such a one; I know thee by name. Here am I - Not only to hear what is said, but to do what I am bidden.