Even when your body does nothing, sin can be active in your mind. When your soul inwardly repulses the evil one's attack by means of prayer, attention, remembrance of death, godly sorrow and mourning the body, too, takes its share of holiness, having acquired freedom from evil actions. This is what the Lord meant by saying that someone who cleans the outside of the cup has not cleansed it inside, but clean the inside and the whole cup will be clean
Gregory PalamasThe commemoration of Christ's saving Passion is at hand, and the new, great spiritual Passover, which is the reward for dispassion and the prelude of the world to come. Lazarus proclaims it in advance by coming back from the depths of Hades and rising from the dead on the fourth day just by voice and command of God, Who has power over life and death (cf. Jn. 11:1-45).
Gregory PalamasAnyone who has fallen into fornication, adultery or any other such bodily impurity, should desist from this revolting filth and cleanse himself through confession, tears, fasting and the like. For God judges unrepentant fornicators and adulterers. He condemns them, dismisses them and consigns them to hell, unquenchable fire and other never-ending punishments, saying, 'Let the impure and accursed be taken away, lest they see and enjoy the glory of the Lord' (cf. Isa. 26:10 LXX).
Gregory PalamasIf you put something fragrant on to burning coals, you motivate those who approach to come back again and to stay near, but if instead you put on something with an unpleasant, oppressive smell, you repel them and drive them away. It is the same with the mind. If your attention is occupied with what is holy, you make yourself worthy of being visited by God, since this is the sweet savour which God catches scent of. On the other hand, if you nurture evil, foul and earthly thoughts within you, you remove yourself from God's supervision and unfortunately make yourself worthy of His aversion.
Gregory Palamas