Context: The quotes here are taken from the C.S. Lewis sci-fi novel Perelandra in which protagonist, Ransom, goes to an extremely ideal Venus to have philosophical discoveries and box with a man possessed by a demon.

These quotes come from the beginning of the novel when Ransom is attempting to describe the experience of having been transported through space by extraterrestrial means which had augmented his body to protect it from cold and hunger and atrophy for the duration of the journey.

This discussion (taking place in a debate over the Christian afterlife) touches upon certain sentiments about how the augmentation (or, for Lewis, glorification) of modern human bodies does not lessen us as humans but instead only improves that which is there.

'Oh, don't you see, you ass, that there's a difference between a trans-sensuous life and a non-sensuous life?'

What emerged was that in Ransom's opinion the present functions and appetites of the body would disappear, not because they were atrophied but because they were, as he said, 'engulfed.' He used the word 'trans-sexual' I remember and began to hunt about for some similar words to apply to eating (after rejecting 'trans-gastronomic'), and since he was not the only philologist present, that diverted the conversation into different channels.

I was questioning him on the subject and had incautiously said, 'Of course I realise it's all rather too vague for you to put into words,' when he took me up rather sharply, for such a patient man, by saying, 'On the contrary, it is words that are vague. The reason why the thing can't be expressed is that it's too definite for language.'

C.S. Lewis, Perelandra, p. 29.