Philippians 3:12, ESV: Not that I have already obtained this or am already perfect, but I press on to make it my own, because Christ Jesus has made me his own.
Paul does not want his readers to think he saw himself as perfect and sinless. He is clear that his life is a work in progress (Romans 7). Paul has not yet been made like Christ, in a resurrected body, and has not yet reached the point of being without sin. This accomplishment is something which only happens when we are perfected in heaven.Instead of claiming to be perfect now, Paul continues to pursue becoming more like Christ. A Christ-like life is not a moment to achieve, but a goal to pursue. Paul knows he would never be perfect in this world, but instead made it his ambition to become increasingly like Christ in this life. https://www.bibleref.com/Philippians/3/Philippians-3-12.html