I was still young and the whole world of beauty was opening before me, my own officious obstructions were often swept aside and, startled into self-forgetfulness, I again tasted Joy. ... One thing, however, I learned, which has since saved me from many popular confusions of mind. I came to know by experience that it is not a disguise of sexual desire. ... I repeatedly followed that path - to the end. And at the end one found pleasure; which immediately resulted in the discovery that pleasure (whether that pleasure or any other) was not what you had been looking for. No moral question was involved; I was at this time as nearly nonmoral on that subject as a human creature can be. The frustration did not consist in finding a "lower" pleasure instead of a "higher." It was the irrelevance of the conclusion that marred it. ... You might as well offer a mutton chop to a man who is dying of thirst as offer sexual pleasure to the desire I am speaking of. ... Joy is not a substitute for sex; sex is very often a substitute for Joy. I sometimes wonder whether all pleasures are not substitutes for Joy.
C.S. Lewis, Surprised by Joy: The Shape of My Early Life
joy, pleasure