A body yielded to God is a sacred act. When you thank Christ and ask Him to sanctify your body, you are offering back to Him what already belongs to Him. This body is not your own. You have been bought at a great price, and now it serves as a temple of the Holy Spirit living within you. So the real question beneath that prayer is not whether God is willing to sanctify what you bring, but whether you are willing to let that body be an instrument for righteousness, rather than a tool ruled by its natural appetites.
There is a natural body and there is a spiritual body. The natural body feels every hunger, every desire, every craving of the flesh. It is a good creation, fearfully made, but it is not the real you. The real you is spirit, housed for now in this earthly frame. If the body rules, the mind becomes occupied with nothing but its needs, what to eat, what to drink, what physical comfort to chase next. That way of living, dominated by the body, separates us from fellowship with God. It is the mind of the flesh, and it leads to spiritual death. But when you present your body as a living sacrifice, something shifts. The Spirit dwelling in you begins to use your physical life for eternal purposes.
Think of how the whole church is described as one body with many members. You are not the whole body, and no one else is the whole body either. You have a vital part to fill, a ministry that no other member can perform in quite the same way. When one part suffers, the whole feels it. When one part is honored, there is shared joy. The same Spirit who anointed the priesthood long ago to set them apart for service now anoints you, not with oil poured on a tabernacle of wood and gold, but with His presence upon a living temple. Your physical life, including how you handle your body, becomes part of that priestly calling. And as our prayers are anointed, they rise not as isolated words but as the fragrance of a body joined together, needing every hidden and visible part to function fully.
Right now you are living in a body that is decaying. The forces of corruption are at work on every cell. Yet the grain that falls into the ground and dies is not the body that will be. What God raises is something new, something that pleases Him, a spiritual body modeled after the resurrected body of Jesus Himself. While you remain in this tent, you are absent from the Lord in one sense, yet His Spirit makes this earthly frame His dwelling. So it matters how you use these members now. It matters because your body is for the Lord, and the Lord is for your body. Not for immorality, not for self-indulgence, but for glory. To have Christ magnified in your body, that is the purpose for remaining here.
That prayer for sanctification and anointing is an admission that you do not live for yourself. It is an act of holy submission. The world insists that the body belongs to the individual to do with as one pleases, but that is not the language of a child of God. You belong to Another. Let the Spirit direct how your hands serve, where your feet go, what your eyes behold, what your mouth speaks. As you and other believers offer yourselves in this way, the body of Christ on earth begins to function as He designed, not spastic and disjointed, but coordinated in love, powerful in its witness. The anointing rests on a yielded vessel, and it hallows even the simplest acts done in His name.