Jesus does not promise we are not going to be ambushed by our adversary, who prowls about like a lion actively searching for one to devour. Instead, Jesus offers us “the might of His virtue” and “the armour of God” so we might “stand against the ambushings of the devil.” Paul puts it like this:
“Here afterward, brethren, be ye comforted in the Lord, and in the might of his virtue. Clothe you with the armour of God, that ye be able to stand against the ambushings [the ambushings, or assailings,] of the devil.”
Paul strongly advises:
“13Therefore take ye the armour of God, that ye be able to against-stand in the evil day; and in all things stand perfect.
14 Therefore stand ye, and be girded about your loins in soothfastness [Therefore stand ye, girded about your loins in soothfastness], and clothed with the habergeon of rightwiseness,
15 and your feet shod in making ready of the gospel of peace.
16 In all things take ye the shield of faith, in which ye be able to quench all the fiery darts of him that is most wicked.
17 And take ye the helmet of health, and the sword of the Ghost, that is, the word of God.
18 By all prayer and beseeching pray ye all time in Spirit, and in him waking in all busyness, and beseeching for all holy men, [By all prayer and beseeching praying all time in Spirit, and in him waking in all busyness, and beseeching for all saints,]”
Paul says to “stand perfect” “in all things.” Jesus says, “Be perfect as your Heavenly Father is perfect.” How do you stand perfect? You stand perfect “in the might of His virtue” through faith, truth, righteousness, wisdom, the gospel of peace, the Word of God, prayer, and God’s own Holy Spirit indwelling.