Along with our salvation, the Lord wants us to live sanctified lives, walking with Him and serving in ministry.
Romans 12:1-2 I beseech you therefore, brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service.
Within ourselves this is impossible, but through the mercies and help of the Lord we can walk in submission to His divine will.
A living sacrifice remembers that we belong to God and that everything the body does is held to the guidelines of the Word of God.
A living sacrifice means a constant, continuous sacrifice, not something we do from time to time or ask for it back again.
We may fail now and then, but God is His love and mercy and grace will lift us up again when we turn to Him.
The Lord wants us to be His vessels through which He can live and work in this world.
He is worthy of our worship and service.