The greater danger we are subject to, the more watchful and careful we must be for our safety. When Christ saw the severe agony he was about to enter into, he did not only watch and pray himself but also called upon his Disciples to watch and pray: and because they did not, he rebuked them for their sluggishness. Saint Peter urges this duty of watchfulness for a similar reason; namely, because we have such a fearful enemy. External, temporal dangers make natural men watchful and careful for their temporal estates and lives, as the histories of all times and ages show. Seeing then that spiritual dangers are much more fearful, should we not be much more careful?