Paragraphs 159 through 165 will address the matter of Combat And Vigilance.
159. We are not dealing merely with a battle against the world and a worldly mentality that would deceive us and leave us dull and mediocre, lacking in enthusiasm and joy. Nor can this battle be reduced to the struggle against our human weaknesses and proclivities (be they laziness, lust, envy, jealousy or any others). It is also a constant struggle against the devil, the prince of evil. Jesus himself celebrates our victories. He rejoiced when his disciples made progress in preaching the Gospel and overcoming the opposition of the evil one: “I saw Satan fall like lightning from heaven” (Luke 10:18).
Not a surprising sentiment, coming from a Jesuit. The caution I’ve seen needed is attributing evil to something outside of the human sinner. It’s important to concede one’s own culpability. It can be too easy to attribute the demonic to concrete groups or persons on Earth. That said, the struggle against evil, be it perpetrated by another person or a supernatural entity requires vigilance, courage, and any number of other qualities.