**Everyone, therefore, must guard against temptation and must watch in prayer lest the devil, who never sleeps but goes about seeking whom he may devour, find occasion to deceive him. **
The initial warning from aKempis.
**Yet temptations, though troublesome and severe, are often useful to a man, for in them he is humbled, purified, and instructed. The saints all passed through many temptations and trials to profit by them, while those who could not resist became reprobate and fell away.**
Do WE really learn from our temptations? My priest shared with me that the more holy a person is, the more he or she is tempted by the devil. Somber words. (But I think it is true.)