(4.) Let us see the caution inferred from all this. We have it twice (v. 15): Therefore take heed to your spirit, and let none deal treacherously against the wife of his youth; and again, v. 16. Note, Those that would be kept from sin must take heed to their spirits, for there all sin begins; they must keep their hearts with all diligence, must keep a jealous eye upon them and a strict hand, and must watch against the first risings of sin there. We shall act as we are spirited; and therefore, that we may regulate our actions, we must consider what manner of spirit we are of; we must take heed to our spirits with reference to our particular relations, and see that we stand rightly affected to them and be of a good temper, for otherwise we shall be in danger of dealing treacherously. If our own hearts deal treacherously with us, whom will they not deal treacherously with?