It's not strange if you would read the context. We are only righteous, holy and redeemed "in Christ Jesus". Of ourselves, outside Christ, we are sinners.....
The difference in the meaning of the words, we are redeemed sinners. The emphasis is now we walk in the kingdom, we are born again. We are no longer in condemnation, but walk in righteousness from the heart. We become a saint over time, through actions that transform who we are.
People imagine they are a static object, when actually we often behave from a product of our experiences and how we react to them. The problem is a large part of who we are and how we interact is from learnt reactions. This is our emotional wallpaper, which tells us how to react given defined situations. By walking with Jesus we become something different, we are remolded, by Him and His spirit through obedience. Sin freezes our hearts, cuts off our emotions and heart, but Jesus makes us real, alive.
Many here are so scared of this reality, religion is like a barrier against the things they fear within. But this is not where Jesus meant us to walk within.
This is important because without this basic transformation walking with Jesus is impossible, because we are not touched or changed, it is just words, a mask hiding the emotional realities within. Do not think I am saying this is simple, this is eternal life, effecting our very foundations.
This all impinges on what you think Jesus did on the cross, how he dealt with your and my sin, and why the cross is healing to our hearts. The strange trip for me is to reject the formalism of the words that seemed to encompass truth, but only in isolation. After growing within, and learning more about life and myself, the window opened up, to give greater meaning, but with the same scripture.
What you have in scripture is insights into a reality we often only see on the surface, but is still eternally profound.