John Chrysostom
Here the Apostle shows that Christ reconciled men when they were unworthy of reconciliation. The expression "were under the authority of darkness" points to the wretched condition in which they were.
But lest you, hearing of the dark authority, imagine some necessity, he adds: "And you, who once were alienated." Though here he seems to say the same thing, in fact he does not.
It is not the same thing to deliver from evil a man who suffered evil by necessity, and one who voluntarily subjected himself to it. The first is worthy of pity, but the last of revulsion.
Yet, according to the Apostle, He freed us, who had departed from Him not unwillingly or by compulsion, but voluntarily. He reconciled us in spite of our unworthiness.
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Since the Apostle had mentioned heavenly things above, he now shows that all the enmity has its origin here, not there. They, the inhabitants of heaven, had long desired reconciliation, and God also desired it, but you did not.
He makes it wholly clear that, if men had remained enemies until the last times, the angels could have done nothing. They could neither persuade men nor, having persuaded them, free them from the devil.
There would have been no benefit in persuading them without binding the ruler, the devil. Likewise, there would have been no benefit in binding the ruler if those held under his power did not wish to be delivered.
Both things had to be done. The angels could do neither, but Christ fulfilled both. And persuading men was a more wondrous work than destroying death. The latter depended entirely on Him, and He alone was master of it. In the former He did not act alone, but we also took part. We more readily accomplish what depends on ourselves.
Thus what was more important the Apostle places after. He did not simply say "enemies," but "alienated," which signifies intense enmity. Nor does he say only alienated, but also not expecting reunion.
"And enemies in disposition," he says, showing that their alienation was not only in intention. In what, then? "By evil works," that is, you both were enemies and acted as enemies.