Roman Catechism 40.11

Chapter 40 — Part IV: Prayer — The Sixth Petition: Lead Us Not into Temptation

Section 11. Audacity Of The Demons — From all this we may understand that the power of these enemies is great, their courage undaunted, their hatred of us enormous and unmeasured; that they also wage against us a perpetual war, so that with them there can be no peace, no truce.