Guard, nourish, and warm your wife as an instrument, yet not a mechanical one, but one that acts freely, as a helper and coworker. The Apostle's aim is not to dispose husbands to love their wives, for this happens of itself. His aim is to transform this love from something natural into a moral law and duty.
It must not be violated by any whim of the heart, but must preserve its force for the whole of life, like the union of soul and body. Above all, his aim is to transform it from fleshly love into spiritual love, to spiritualize it.
He does this by pointing to the rational relation to the body, and especially by pointing to the relation of Christ the Lord to the Church. Everyone nourishes and warms his own flesh. Nourish and warm your wife also, but as Christ the Lord nourishes and warms His Church.
By the words "nourish" and "warm," the Apostle signified all-sided care. By pointing to Christ's warming and nourishing of the Church, he defined the qualities and aims of this care.
For what purpose does Christ care for the Church? That she may be holy and without reproach, as was said above. One must suppose that the Apostle also understands similar aims by nourishing and warming the wife. He does not mean only feeding her, clothing her, and giving her shoes.
Blessed Jerome offers this thought: let wives also strive toward complete pleasing of God, that they may rise into the perfect man and cease to be wives. Then, taking the Apostle's words figuratively, seeing the soul in the husband and the flesh in the wife, he says: let the soul so train its flesh that it too may see the salvation of God.
Finally he brings both together and says: "Let husbands warm their wives, and souls their bodies, so that wives may be transformed into husbands and bodies into souls, and so that the distinction of the sexes may cease. As among the angels there is neither male nor female, so let us, who are to be equal to the angels, begin already to be what we are promised to be in heaven."
Still, one must not lose sight of the fact that the Apostle explains the duty of love only from the Christian point of view. He sets forth the example of Christ the Lord's love for the Church both as a model and, perhaps, to clarify mutually the relation of Christ the Lord to the Church. He applies what is known in the natural order to the supernatural order.
Yet it is also true that nothing like the way Christ nourishes and warms the Church exists, or can exist, in any natural order. Here he does not mean what the Lord said about His care for the Old Testament Church: "How often I wished to gather your children under My wings" (Mt 23:37; Lk 13:34), though that too has its place.
He means something more special, closer, and more essential. For Christ's union with the Church is not external, one beside the other, but most inward, one in the other.
Eve came from Adam, yet she stood outside him, and their union remained psychic, as is the union of husband and wife. The Church also comes from Christ, but she does not stand outside Him. She has Him within herself, penetrating everything in her and living in her whole being.
The Apostle expresses this in the following text: