There are two ways to offer ourselves—(1) by the mercies of God and (2) as a living, holy, and acceptable sacrifice. The first way is to offer ourselves out of gratitude to God’s mercies. Paul talks about the mercies of God in Rom. 11:31—“Just as you were at one time disobedient to God but now have received mercy because of their disobedience.”
What are these mercies? God was merciful to people who were at one time disobedient but now have come to Christ by faith. God extended His mercy to sinners through the death of Christ. Thus, we should offer ourselves out of gratitude to God for His mercies to us in Christ.
Are you grateful to God for His mercy to save you from your sin? The only right response is to offer yourself as a sacrifice to God.