True Christianity is growth in the life of the Spirit, a deepening of the new life, a continuous rebirth, in which the exterior and superficial life of the ego-self is discarded like an old snake skin and the mysterious, invisible self of the Spirit becomes more present and more active. The true Christian rebirth is a renewed transformation, a “Passover” in which [a person] is progressively liberated from selfishness and not only grows in love but in some sense “becomes love.” The perfection of the new birth is reached where there is no more selfishness, there is only love.  –Thomas Merton