…what man is potentially in his nature by grace, he must also become personally and actively by his free will in all his life and being. For, as St Gregory of Nyssa warns: “That which you all have not become, you are not.”
And St Diadochus of Photice spells out in detail that if the first of the gifts bestowed by the grace of baptism is the immediate restoration of the image of God, the second gift–the likeness of God–“requires our cooperation.”
~Dr Jean-Claude Larchet (Therapy of Spiritual Illnesses vol. 2, p. 57)
Prayerful Life 