We all are familiar with soldier ants positioned strategically along their marching line when on an invasion to deal with any intruder. This tells us invariably ants don’t lose guard most especially when they are on invasion.
And in relation to us as Christians, we are expected to “be sober, be vigilant; because your adversary the devil, as a roaring lion, walketh about, seeking whom he may devour.” Therefore take unto you the whole armour of God, that ye may be able to withstand in the evil day, and having done all, to stand. 1 Pt. 5:8, Eph. 6:13
To him that thinks he stands, take heed so you don’t fall.