It is well to bear this in mind. We, as Christians, are called to carry on a constant spiritual warfare. We have to fight for every inch of heavenly ground. What the Canaanites were to Israel, the wicked spirits in the heavenlies are to us. We are not called to fight for eternal life; we have gotten that as God's free gift before we begin. We are not called to fight for salvation; we are saved before we enter upon the conflict. It is most needful to know what it is that we have to fight for, and whom we are to fight with. The object for which we fight is, to make good, maintain, and carry out practically our heavenly position and character in the midst of the scenes and circumstances of ordinary human life from day to day. And then as to our spiritual foes, they are wicked spirits, who, during this present time, are permitted to occupy the heavenlies. "We wrestle not against flesh and blood, [as Israel had to do in Canaan,] but against principalities, against powers, against the world-rulers [κοσμοκράτορας] of this darkness, against wicked spirits in the heavenlies." Now, the question is, what do we want in carrying on such a conflict as this? Must we abandon our lawful earthly callings? must we detach ourselves from those relationships founded on nature and sanctioned of God? Is it needful to become an ascetic, a mystic, or a monk in order to carry on the spiritual warfare to which we are called? By no means; indeed, for a Christian to do any one of these things would, in itself, be a proof that he had completely mistaken his calling, or that he had, at the very outset, fallen in the battle. We are imperatively called upon to work with our hands the thing which is good, that we may have to give to him that needeth. And not only so, but we have the most ample guidance, in the pages of the New Testament, as to how we are to carry ourselves in the varied natural relationships which God Himself has established, and to which He has affixed the seal of His approval. Hence it is perfectly plain that earthly callings and natural relationships are, in themselves, no hindrance to our waging a successful spiritual warfare.