" Q. [69] If, as St John says, he who is born of God does not sin, because his seed dwells in God, and he cannot sin (1 Jn 3:9), and yet he who is born of water and Spirit is himself born of God (cf Jn 3:5–6), then how are we who are born of God through baptism still able to sin? R. The manner of birth from God within us is two-fold: the one bestows the grace of adoption, which is entirely present in potency (δυνάμει) in those who are born of God; the other introduces, wholly by active exertion (κατ’ ἐνέργειαν), that grace which deliberately (γνωμικῶς) reorients the entire free choice of the one being born of God toward the God who gives birth. "
― St. Maximus the Confessor , On the Cosmic Mystery of Jesus Christ: Selected Writings