ST ANTONY ON SPIRITUAL WARFARE
'The demons, therefore, if they see all Christians, and monks especially, laboring cheerfully and advancing, first make an attack by temptation and place hindrances to hamper our way, to wit, evil thoughts. But we need not fear their suggestions, for by prayer, fasting, and faith in the Lord their attack immediately fails. But even when it does, they cease not, but knavishly by subtlety come on again. For when they cannot deceive the heart openly with foul pleasures they approach in different guise, and thenceforth shaping displays they attempt to strike fear, changing their shapes, taking the forms of women, wild beasts, creeping things, gigantic bodies, and troops of soldiers. But not even then need you fear their deceitful displays. For they are nothing and quickly disappear, especially if a man fortify himself beforehand with faith and the sign of the cross.