Devils who come in disguise

"Lead us not into temptation"

Believe me, sisters, the soldiers of Christ--namely, those who experience contemplation and practise prayer--are always ready for the hour of conflict. They are never very much afraid of their open enemies, for they know who they are and are sure that their strength can never prevail against the strength which they themselves have been given by the Lord: they will always be victorious and gain great riches, so they will never turn their backs on the battle.

Those whom they fear, and fear rightly, and from whom they always beg the Lord to deliver them, are enemies who are treacherous, devils who transform themselves and come and visit them in the disguise of angels of light. The soul fails to recognize them until they have done it a great deal of harm; they suck our life-blood and put an end to our virtues and we go on yielding to temptation without knowing it. From these enemies let us pray the Lord often, in the Paternoster, to deliver us: may He not allow us to run into temptations which deceive us; may their poison be detected; and may light and truth not be hidden from us. How rightly does our good Master teach us to pray for this and pray for it in our name!

-- from "The Way of Perfection" by St. Teresa of Avila -- Ch. 38