Doing flows from being.
This side of heaven, there is still sin in me. I am a wretched sinner.
Born again, I am a new creation and the Spirit of Christ resides in me. I am a saint.
As Cornelius Plantinga writes in Beyond Doubt:
As a result, all Christians need to say two things. We admit that we are redeemed sinners. But we also say boldly and joyously that we are redeemed sinners (89).
Here in this tension is the perfect storm for the mortification of sin by the power of grace. If I hold only that I am a wretched sinner, I trudge against sin, pursue holiness as one through quicksand, motivated perhaps only by self-pity. And if I hold only that I am a saint, I shield my eyes to my pride and egotism, become passive about sin, claiming victories under my own legalistic power that don’t exist.
But if I put the vinegar of the acknowledgment of my indwelling sinfulness together with the sodium bicarbonate of my eternal standing in God by the grace of Jesus Christ and his righteousness credited to me through faith — look out! Only in the grasping of this double-reality can I fight against my flesh with the holiness God commands through the power of the holiness he has already imputed to me.