1) The Christian Life is a Constant Process of Transformation.
But we all, with unveiled face, beholding as in a mirror the glory of the Lord, are being transformed into the same image from glory to glory, just as from the Lord, the Spirit.
[2 Corinthians 3:18]
And do not be conformed to this world, but be transformed by the renewing of your mind, so that you may prove what the will of God is, that which is good and acceptable and perfect.
Although at a certain point in our lives we can produce offspring, this does not mean that we are mature, or better, have reached the final stage of what God wants us to be. We are in process throughout our lives. In other words, we are always becoming - whether a 46 year old postal worker or a 42 year old mother of 4. Paul understood this completely. Although as young man he would describe himself as a "Hebrew of Hebrews" and "as to the law, a Pharisee" he would later understand himself in a different light...
2) I will be who I will be, because Christ is who Christ is!
I have been crucified with Christ; and it is no longer I who live, but Christ lives in me; and the life which I now live in the flesh I live by faith in the Son of God, who loved me and gave Himself up for me.
Paul understood what we do not. Whatever life we have as a follower of Christ is bound up in the life and integrity that is Christ Jesus. Paul counted his education and religious context as refuse.
3) I can only understand "what God wants me to be" now...
Brethren, I do not regard myself as having laid hold of it yet; but one thing I do: forgetting what lies behind and reaching forward to what lies ahead, I press on toward the goal for the prize of the upward call of God in Christ Jesus.
Let us therefore, as many as are perfect, have this attitude; and if in anything you have a different attitude, God will reveal that also to you; however, let us keep living by that same standard to which we have attained.
I am not to be conformed to this world; I am not to resign myself to some fatalistic view of my situation - I am to press forward toward the goal for the prize of the upward call of God in Jesus Christ. I am to doggedly cling to Christ, for it is His call, His life that is mine. If Christ is not defining me, my relationships and my hope, then I must change - or be torn asunder by the despair which results from my failure to live the life to which He has called me.
4) I will experience who I am, only when face-to-face with Christ.
For now we see in a mirror dimly, but then face to face; now I know in part, but then I will know fully just as I also have been fully known.
[1 Corinthians 13:12]
When You said, “Seek My face,” my heart said to You, “Your face, O LORD, I shall seek.”
There will no longer be any curse; and the throne of God and of the Lamb will be in it, and His bond-servants will serve Him; they will see His face, and His name will be on their foreheads.
It is only when we are face-to-face with Christ that we will know who we are. In the present, we strive to make Him Lord of our life; to let Him transform us in the painful process of living. He asks us to love deeply, but we shy away from it because love can be painful. Yet it is precisely when we live in obedience to Him that we are changed into what God wants us to be.
Who am I? Who are you?
Only time will tell, as we obediently make Christ Lord over every bit or our lives.