Philippians 3:12–16 (ESV)
Philippians 3:12 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. 
Philippians 3:13 Brothers, I do not consider that I have made it my own. But one thing I do: forgetting what lies behind and straining forward to what lies ahead, 
Philippians 3:14 I press on toward the goal for the prize of the upward call of God in Christ Jesus. 
Philippians 3:15 Let those of us who are mature think this way, and if in anything you think otherwise, God will reveal that also to you. 
Philippians 3:16 Only let us hold true to what we have attained.