I love this Q&A from the Heidelberg Catechism:

Q. 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.

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 must 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 now on to live for him.