What does Ephesians 6:12 mean?

When we as members of the Body of Christ go to war using physical means against flesh and blood we are doomed to always fail. Our weapons are not carnal, nor do we wrestle against flesh and blood. There is not to us a wrestling with flesh and blood." There is undoubtedly here an allusion to the ancient games of Greece, a part of the exercises in which consisted in wrestling. The Greek word used here (pale) denotes a "wrestling;" and then a struggle, a fight, and finally combat. Here it refers to the struggle or combat, which the Christian has to maintain - the Christian warfare. It is not against flesh and blood - Not with people. The apostle does not mean to say that Christians had no enemies among men that opposed them, for they were exposed often to fiery persecution; nor that they had nothing to contend with in the carnal and corrupt propensities of their nature, which was true of them then as it is now; but that their controversy was with the invisible spirits of wickedness that sought to destroy them. They were the source and origin of all their spiritual conflicts, and with them the warfare was to be maintained.

But against principalities - There can be no doubt whatever that the apostle alludes here to evil spirits. Like good angels, they were regarded as divided into ranks and orders, and were supposed to be under the control of one mighty leader; see Eph.1:21. It is probable that the allusion here is to the ranks and orders, which they sustained before their fall, something like which they still retain. The word "principalities" refers to principal rulers, or chieftains. Powers - Those who had power, or to whom the name of "powers" was given. Against the rulers of the darkness of this world - The rulers that preside over the regions of ignorance and sin with which the earth abounds. "Darkness" is an emblem of ignorance, misery, and sin; and no description could be more accurate than that of representing these malignant spirits as ruling over a dark world. The earth - dark, and wretched and ignorant, and sinful - is just such a dominion as they would choose, or as they would cause; and the degradation and woe of the pagan world are just such as foul and malignant spirits would delight in. It is a wide and a powerful empire. It has been consolidated by ages. All the authority of law; by all the omnipotence of the perverted religious principle; by all the reverence for antiquity; by all the power of selfish, corrupt, and base passions sustain it. No empire has been so extended, or has continued so long, as that empire of darkness; and nothing on earth is so difficult to destroy.

Yet the apostle says that it was on that kingdom we are to make war. Against that, the kingdom of the Redeemer was to be set up; and that was to be overcome by the spiritual weapons, which he specifies. When he speaks of the Christian warfare here, he refers to the contest with the powers of this dark kingdom. He regards each and every Christian as a soldier to wage war on it in whatever way he could, and wherever he could attack it. The contest therefore was not with people, or with the internal corrupt propensities of the soul; it was with this vast and dark kingdom that had been set up over mankind. I do not regard this passage, therefore, as having a primary reference to the struggle that a Christian maintains with his own corrupt propensities. It is warfare on a large scale with the entire kingdom of darkness over the world on the evil day. Yet in maintaining the warfare, the struggle will be with such portions of that kingdom as we come in contact with and will actually relate:

(1) to our own sinful propensities - which are a part of the kingdom of darkness,

(2) with the evil passions of others - their pride, ambition, and spirit of revenge - which are also a part of that kingdom;

(3) with the evil customs, laws, opinions, employments, pleasures of the world - which are also a part of that dark kingdom,

(4) with error, superstition, false doctrine - which are also a part of that kingdom; and,

(5) with the wickedness of the pagan world - the sins of benighted nations - also a part of that kingdom. Wherever we come in contact with evil - whether in our own hearts or elsewhere - there we are to make war.

Against spiritual wickedness - "or wicked spirits." Literally, "The spiritual things of wickedness;" but the allusion is undoubtedly to evil spirits, and to their influences on earth. The devil is a spirit, a wicked spirit; and our danger is the greater from our enemies because they are unseen, and assault us where we are aware of them. The devils are wicked spirits, and they chiefly exasperate the saints with, and provoke them to, spiritual wickedness's, pride, envy, malice, etc. In high places - "in celestial or heavenly places." These enemies are said to be in high places, or in heavenly places, so the word is, taking heaven for the whole "expansum," or spreading out of the air between the earth and the stars, the air being the place from which the devils assault us. The same phrase occurs in Eph.1:3; Eph.2:6, where it is translated, "in heavenly places." The word (epouranios) is used of those that dwell in heaven, Mat.18:35; Phi.2:10; of those who come from heaven, 1Co.15:48; Phi.3:21; of the heavenly bodies, the sun, moon, and stars, 1Co.15:40.

Then the neuter plural of the word is used to denote the heavens; and then the "lower" heavens, the sky, the air, represented as the seat of evil spirits. This is the allusion here. The evil spirits are supposed to occupy the lofty regions of the air, and thence to exert a baleful influence on the affairs of man. What was the origin of this opinion it is not needful here to inquire? No one can "prove," however, that it is incorrect. It is against such spirits, and all their malignant influences, that Christians are called to contend. In whatever way their power is put forth - whether in the prevalence of vice and error; of superstition and magic arts; of infidelity, atheism, or antinomianism; of evil customs and laws; of pernicious fashions and opinions, or in the corruptions of our own hearts, we are to make war on all these forms of evil, and never to yield in the conflict.