Jon Walker in his book, In Visible Fellowship: A Contemporary View of Bonhoeffer’s Classic Work:  Life Together writes in chapter 32 about how confession is a break-through to new live. Dietrich Bonhoeffer wrote…

But where there is a break with sin, there is conversion. Confession is conversion

Walker writes that The Big Idea of the chapter is…

Bonhoeffer says, “Confession is conversion.” We not only confess our sins, but confessing leads to our salvation: “If you confess with your mouth. ‘Jesus is Lord,’ and believe in your heart that God raised Him from the dead, you will be saved. One believes with the heart, resulting in righteousness, and one confesses with the mouth, resulting in salvation.” (Romans 10:9-10, HCSB).

Walker added:

Bonhoeffer says that confession is discipleship…

…Confession, in fact, is a key to living a victorious Christian life. We learn to forsake our sins and focus on our new life with Jesus. And as we confess, we are stronger in saying no to temptation.

…To be like Jesus…We enter our new life in Christ when we confess our sins and then confess our sins and then confess that Jesus is Lord and Savior. The life of Christ works within us to re-create us into the image of Jesus.

(Jon WalkerIn Visible Fellowship: A Contemporary View of Bonhoeffer’s Classic Work: Life Together, Chapter 32)