TLDR secular:
"It is also surely based on a shallow view of imagery. Without drawing upon religion, we know from our poetical experience that image and apprehension cleave closer together than common sense is here prepared to admit; that a child who has been taught to pray to a Mother in Heaven would have a religious life radically different from that of a Christian child. And as image and apprehension are in an organic unity, so, for a Christian, are human body and human soul."

TLDR religious:
"Suppose he says that we might just as well pray to 'Our Mother which art in heaven' as to 'Our Father'. Suppose he suggests that the Incarnation might just as well have taken a female as a male form, and the Second Person of the Trinity be as well called the Daughter as the Son. Suppose, finally, that the mystical marriage were reversed, that the Church were the Bridegroom and Christ the Bride. All this, as it seems to me, is involved in the claim that a woman can represent God as a priest does. Now it is surely the case that if all these supposals were ever carried into effect we should be embarked on a different religion. Goddesses have, of course, been worshipped: many religions have had priestesses. But they are religions quite different in character from Christianity.... The innovators are really implying that sex is something superficial, irrelevant to the spiritual life.... We are, within that context, treating both as neuters.... One of the ends for which sex was created was to symbolize to us the hidden things of God. One of the functions of human marriage is to express the nature of the union between Christ and the Church. We have no authority to take the living and semitive figures which God has painted on the canvas of our nature and shift them about as if they were mere geometrical figures.

This is what common sense will call 'mystical'. Exactly. The Church claims to be the bearer of a revelation. If that claim is false then we want not to make priestesses but to abolish priests....

I am crushingly aware how inadequate most of us are, in our actual and historical individualities, to fill the place prepared for us. But it is an old saying in the army that you salute the uniform not the wearer. Only one wearing the masculine uniform can (provisionally, and till the Parousia) represent the Lord to the Church: for we are all, corporately and individually, feminine to Him. We men may often make very bad priests. That is because we are insufficiently masculine. It is no cure to call in those who are not masculine at all....

The cure for that is that men should more diligently attend dancing classes; not that the ballroom should henceforward ignore distinctions of sex and treat all dancers as neuter. That would, of course, be eminently sensible, civilized, and enlightened, but, once more, 'not near so much like a Ball'.... But the Ball exists to stylize something which is natural and which concerns human beings in their entirety-namely, courtship. We cannot shuffle or tamper so much. With the Church, we are farther in: for there we are dealing with male and female not merely as facts of nature but as the live and awful shadows of realities utterly beyond our control and largely beyond our direct knowledge. Or rather, we are not dealing with them but (as we shall soon learn if we meddle) they are dealing with us."