Living Sacrifice

Just as Jesus Christ had to take on Himself a body in order to accomplish God's will on earth, so we must yield our bodies to Christ that He might continue God's work through us.

Romans 6:13 Neither yield ye your members as instruments of unrighteousness unto sins, but yield yourselves unto God, as those that are alive from the dead, and your members as instruments of righteousness unto God.

As Christians, we must yield the members of our body as "instruments of righteousness" for the Holy Spirit to use in the doing of God's work.

The Old Testament sacrifices were dead sacrifices, but we are to be living sacrifices.