Rom 6:10
We all want to live in sin because of the old sin nature. The trick is to remain in fellowship with Him through faith in Christ so He continues to sanctify our thinking and our heart. Accordingly, while in fellowship with Him, we deny and sacrifice the old man, choosing the mind of the Lord over giving control of our decisions back to the old sin nature.
Repentence is a life-style. There is always turning and mind-renewal and praying for those gifts. It's fun. Mostly.
How does Catholic or Orthodox Church explain Roman 6:10 (in fact Romans 6:1-10)? I think it's a typical example of "Pauline Christianity" that became part of Protestant dogma. It asserts that Christians don't sin (although in verse 11 he urges them not to sin!).
I will let the 'experts' rationalize this one. To me, +Paul is like eating fish full of bones.