The first thing that I want you to notice is what Isaac was doing. It says that he was meditating. Now, that is only about five or six words in the whole Bible. Why do you think that God included that little snippet? It is important to you and me to know what kind of a man Isaac was. That is why it is in there. He was meditating in the evening.
The word that is translated meditate means "to bend down either the mind or the body, or both together." You know, I think that this is intended to show us that Isaac was not spending his time doing nothing.
We already know to this point that he was a pious man, and this is an insight that he was not one to trifle his time away. And what is very likely is that he was praying about the very situation that we are reading about here because he understood, this thing is really going to change my life. And what it is doing, it is telling you that he was consulting with the One who would be able to bring the right thing to pass at the right time.
So what we are looking at is a revelation of Isaac's fear of God and what it produced in him to do, you see, in a practical way. And he was completely submissive. You can see that right from the context. No argument at all on Isaac's part, no indication of any kind of displeasure.