If we had to seek virtue outside of ourselves, that would assuredly be difficult; but as it is within us, it suffices to avoid bad thoughts and to keep our souls turned toward the Lord.
Philoklia
"The demons very much fear six virtues:
1) hunger, 2) thirst, 3) the Prayer of Jesus, 4) the sign of the Cross, that is, he who makes the sign of the Cross correctly upon himself,
5) frequent Communnion of the Most Pure Mysteries of Christ, if one worthily communes, and 6) undoubting hope in God. There is nothing more frightful than this weapon against the demons."
St. Paisius Velichkovsky.