VERSE 29. And if ye be Christ's, then are ye Abraham's seed, and heirs according to the promise.
"If ye be Christ's" means, if you believe in Christ. If you believe in Christ, then are you the children of Abraham indeed. Through our faith in Christ Abraham gains paternity over us and over the nations of the earth according to the promise: "In thy seed shall all the nations of the earth be blessed." Through faith we belong to Christ and Christ to us.
CHAPTER 4
VERSE 1. Now I say, That the heir, as long as he is a child, differeth nothing from a servant, though he be Lord of all; VERSE 2. But is under tutors and governors until the time appointed of the father.
THE Apostle had apparently finished his discourse on justification when this illustration of the youthful heir occurred to him. He throws it in for good measure. He knows that plain people are sooner impressed by an apt illustration than by learned discussion.
"I want to give you another illustration from everyday life," he writes to the Galatians. "As long as an heir is under age he is treated very much like a servant. He is not permitted to order his own affairs. He is kept under constant surveillance. Such discipline is good for him, otherwise he would waste his inheritance in no time. This discipline, however, is not to last forever. It is to last only until 'the time appointed of the father.'"
VERSE 3. Even so we, when we were children, were in bondage under the elements of the world.
As children of the Law we were treated like servants and prisoners. We were oppressed and condemned by the Law. But the tyranny of the Law is not to last forever. It is to last only until "the time appointed of the father," until Christ came and redeemed us.
VERSE 3. Under the elements of the world.