 You cannot pray rightly unless you understand the eternal purposes of God, you see. Second thing, and I have to add that just because it's so obvious, he prayed not only in response to God's Word but in accord with God's will. He said, Lord, You've already said You're going to do it, so do it. In fact, the only request in the whole prayer and all of the stuff from verses 3 through verse 18 is just preparation. And it finally comes down to verse 19, and here's the request.