These above-described effects which such visions cause in the soul may be observed by any one of you whom the Lord leads by this way, and you will then see that they are due neither to deception nor to fancy. For, as I have said, if they are of the devil, I do not think they can possibly last so long or do the soul such a great deal of good, or bring it such inward peace. It is not usual for one who is so evil to do so much good; he could not, in fact, even if he would. The soul would soon become clouded over by the mist of self-esteem and would begin to think itself better than others. But its continual occupation with God and its fixing of the thought on Him would make the devil so furious that, though he might attempt such a thing once, he would not do so often. God is so faithful that He will not allow the devil to have all this power over a soul whose one aim is to please Him and to devote its whole life to His honour and glory; He will see to it that the devil is speedily disillusioned.