The beginning of that transformation which is to change the believing man’s nature from the image of sin to the image of God are found in conversion when the man is made a partaker of the divine nature. By regeneration and sanctification, by faith and prayer, by suffering and discipline, by the Word and the Spirit, the work goes on till the dream of God has been realized in the Christian heart. Everything that God does in His ransomed children has as its long-range purpose the final restoration of the divine image in human nature.
-A.W. Tozer, The Root of the Righteous (emphasis added)