God: "I looked for someone to take a stand for me, and stand in the gap" (Ezekiel 22:30)
This explains why Christ is sometimes not enough for us. If I stand before him as a cup waiting to be filled with psychological satisfaction, I will never feel quite full. Why? First, because my lusts are boundless; by their very nature, they can’t be filled. Second, because Jesus does not intend to satisfy my selfish desires. Instead, he intends to break the cup of psychological need (lusts), not fill it.
In every good work, we must depend on the Lord. If anyone rises so that he may give the time which he takes from sleep to prayer and meditation, let him be sure that Satan will try to put obstacles in the way.