The first is the one we show to others, the second is the reality of who we are and the third is the character we think we are. What we show to others is usually made to look better than what is real because we want to leave a good impression. The character that we really have is seen by those who know us well and the character we think we have is usually a bit generous and is a more inflated version of the real us.
When we strive to have the character and divine nature of God as Peter advised us to do (2 Peter 1:4 2 Peter 1:4Whereby are given to us exceeding great and precious promises: that by these you might be partakers of the divine nature, having escaped the corruption that is in the world through lust.
American King James Version×), we begin to blend the three into one. We strive to exhibit the character of Christ, and in time we become more and more like Him. When that happens, the three characters almost become one. That is the goal set before all mankind—to be one with Christ and the Father (John 17:21 John 17:21That they all may be one; as you, Father, are in me, and I in you, that they also may be one in us: that the world may believe that you have sent me.
American King James Version×). Who are you? Our goal is to be a member of His family—a child of God (Romans 8:13-16 Romans 8:13-16  For if you live after the flesh, you shall die: but if you through the Spirit do mortify the deeds of the body, you shall live.  For as many as are led by the Spirit of God, they are the sons of God.  For you have not received the spirit of bondage again to fear; but you have received the Spirit of adoption, whereby we cry, Abba, Father.  The Spirit itself bears witness with our spirit, that we are the children of God:
American King James Version×).