If It Be Your Will by RC Sproul
Excerpt: This is what it means to pray that the will of God would be done. It is the highest expression of faith to submit to the sovereignty of God. The real prayer of faith is the prayer that trusts God no matter whether the answer is yes or no. It takes no faith to “claim,” like a robber, something that is not ours to claim. We are to come to God and tell Him what we want, but we must trust Him to give the answer that is best for us. That is what Jesus did.