What should they regard as too obscene?

From That Hideous Strength:

Despair of objective truth had been increasingly insinuated into the scientists: indifference to it, and a concentration upon mere power, had been the result. ... Dreams of the far future destiny of man were dragging up from its shallow and unquiet grave the old dream of man as God. The very experiences of the dissecting room and the pathological laboratory were breeding a conviction that the stifling of all deep-set repugnances was the first essential for progress. ... What should they find incredible, since they believed no longer in a rational universe? What should they regard as too obscene, since they held that all morality was a mere subjective by-product of the physical and economic situations of men? The time was ripe. From the point of view which is accepted in Hell, the whole history of our Earth had led up to this moment.

Beauty for another

From That Hideous Strength:

At the very moment when her mind was most filled with another man there arose, clouded with some undefined emotion, a resolution to give Mark much more than she had ever given him before, and a feeling that in doing so she would be really giving it to the Director. And this produced in her such a confusion of sensations that the whole inner debate became indistinct and flowed over into the larger experience... she was in the sphere of Jove, amid light and music and festal pomp, brimmed with life and radiant in health, jocund and clothed in shining garments. ... And she rejoiced also in the consciousness of her own beauty; for she had the sensation--it may have been false in fact, but it had nothing to do with vanity--that it was growing and expanding like a magic flower with every minute that passed. In such a mood it was only natural, after the old countryman had got out at Cure Hardy, to stand up and look at herself in the mirror which confronted her on the wall of the compartment. Certainly she was looking well: she was looking unusually well. And once more, there was little vanity in this. For beauty was made for others. Her beauty belonged to the Director. It belonged to him so completely that he could even decide not to keep it for himself but to order that it be given to another, by an act of obedience lower, and therefore higher, more unconditional and therefore more delighting, than if he had demanded it for himself."

The Infinite throws out the elected invention

From That Hideous Strength:

To those high creatures whose activity builds what we call nature, nothing is "natural." From their station the essential arbitrariness (so to call it) of every actual creation is ceaselessly visible; for them there are no basic assumptions: all springs with the wilful beauty of a jest or a tune from that miraculous moment of self-limitation wherein the Infinite, rejecting a myriad possibilities, throws out of himself the positive and elected invention.

On equality

From That Hideous Strength:

"Yes, we must all be guarded by equal rights from one another's greed, because we are fallen. Just as we must all wear clothes for the same reason. But the naked body should be there underneath the clothes, ripening for the day when we shall need them no longer. Equality is not the deepest thing, you know." ... "It is not your fault. They never warned you. No one has ever told you tht obedience--humility--is an erotic necessity. You are putting equality just where it ought not to be." ... "But you see that obedience and rule are more like a dance than a drill--specially between man and woman where the roles are always changing."

Ode to a walled garden

From That Hideous Strength:

Freud said we liked gardens because they were symbols of the female body. But that must be a man's point of view. Presumably gardens meant something different in women's dreams. Or did they? Did men and women both feel interested in the female body and even, though it sounded ridiculous, in almost the same way? A sentence rose to her memory. "The beauty of the female is the root of joy to the female as well as to the male, and it is no accident that the goddess of Love is older and stronger than the god."

Obedience is the stairway of pleasure

From That Hideous Strength:

"The beauty of the female is the root of joy to the female as well as to the male, and it is no accident that the goddess of love is older and stronger then the god. To desire the desiring of her own beauty is the vanity of Lilith, but to desire the enjoying of her beauty is the obedience of Eve, and to both it is in the lover that the beloved tastes her own delightfulness. As obedience is the stairway of pleasure, so humility is the..."

--C. S. Lewis

Ed: Interesting how this quote within a quote was interrupted...