Romans 9:10,11

Nor was the restriction and special selection confined to the case of Abraham alone. It also appeared when Rebecca bore sons to Isaac. It was indeed pure selection. The children themselves had done nothing to make a preference be given to one over the other. There was no merit in the case. The object of the declaration was to ratify the divine electing purpose which had already chosen Jacob to be the inheritor of the Messianic blessings.

Here we have the doctrine of election and predestination stated in a very unqualified and uncompromising form. And it does indeed necessarily follow from one train of thought. However much we lay stress on freewill, still actions are the result of character — the will itself is a part of character; and character is born in us. Of the two elements which go to determine action, outward circumstances, and inward disposition, neither can be said strictly to be made by the man himself. If we follow this train of thought, then it would certainly appear that God, or the chain of natural causes set in motion and directed by God, made him what he is. In other words, he is elected and predetermined to a certain line of conduct. This is the logic of one set of inferences. On the other hand, the logic of the other set of inferences is just as strong — that man is free. There is an opposition irreconcilable to us with our present means of judging. We can only take the one proposition as qualified by the other.