If the words of God are uttered merely as verbal expressions, and their message is not rooted in the virtuous way of life of those who utter them, they will not be heard. But if they are uttered through the practice of the commandments, their sound has such power that they dissolve the demons and dispose men eagerly to build their hearts into temples of God through making progress in works of righteousness.

The man who has struggled bravely with the passions of the body, has fought ably against unclean spirits, and has expelled from his soul the conceptual images they provoke, should pray for a pure heart to be given him and for a spirit of integrity to be renewed within him (cf. Ps. 51:10). In other words, he should pray that by grace he may be completely emptied of evil thoughts and filled with divine thoughts, so that he may become a spiritual world of God, splendid and vast, wrought from moral, natural and theological forms of contemplation.

The patient endurance of the saints exhausts the evil power that attacks them, since it makes them glory in sufferings undergone for the sake of the truth. It teaches those too much concerned with a life in the flesh to deepen themselves through such sufferings instead of pursuing ease and comfort; and it makes the flesh's natural weakness in the endurance of suffering a foundation for overwhelming spiritual power. For the natural weakness of the saints is precisely such a foundation, since the Lord has made their weakness stronger than the proud devil.

Unclean spirits increase the passions in us, making use of our negligence, and inciting them. But the angels decrease our passions, inciting us to the perfection of virtue.

We must not only put bodily passions to death but also destroy the soul's impassioned thoughts. Hence the Psalmist says, 'Early in the morning I destroyed all the wicked of the earth, that I might cut off all evil-doers from the city of the Lord' (Ps. 101:8) - that is, the passions of the body and the soul's godless thoughts.

Dispassion and humility lead to spiritual knowledge. Without them no one will see the Lord.

Theology without practice is the theology of demons