From the Heidelberg Catechism:

Q1: What is your only comfort in life and in death?

A: That I am not my own, BUT belong, body and soul, in life and in death–to my faithful Savior Jesus Christ.

That’s a big catechismal but, I tell you. It’s not enough to understand that I am not my own. Rather, comfort which transcends is enjoyed only when we acknowledge that we belong to Christ. That’s the important part of this Q&A. I am not my own, BUT I belong, rather, to Christ.

The rest of the answer reads like this:

He has fully paid for all my sins with his precious blood, and has set me free from the tyranny of the devil. He also watches over me in such a way that not a hair can fall from my head without the will of my Father in heaven; in fact, all things work together for my salvation. Because I belong to him, Christ, by his Holy Spirit, assures me of eternal life and makes me wholeheartedly willing and ready, from no on, to live for him.

Take a look at Romans 8:1-17 and Titus 3:3-7. Look what Jesus has done! Can you confess with the catechism: I am not my own, BUT I belong to Jesus?