Like many things in the Kingdom, our life in Christ is paradoxical. We’re already complete in Him, yet we’re growing up into Him (Eph.4:13, 15). Both are equally true. And grace transports us from where we are experientially to who we already are in reality.
http://melwild.wordpress.com/2014/10/24/grace-enables-you-to-grow-up-into-who-you-already-are/