I don’t mean to say that I have already achieved these things or that I have already reached perfection. But I press on to possess that perfection for which Christ Jesus first possessed me. Paul, Philippians 3:12 NLT

And we all, with unveiled face, beholding the glory of the Lord, are being transformed into the same image from one degree of glory to another. 2 Corinthians 3:18 ESV

Your spiritual growth is not measured by the fact that you haven’t turned back, but that you are able to accept God’s invitation to come up higher, to move up to the next level of glorifying God. To be able do so you must live up to the highest and best personal character that you know. Never let God show you a truth that you don’t immediately begin to live up to.