It was Christianity, with its heartfelt resentment against life, that first made something unclean of sexuality: it threw filth on the origin, on the essential fact of our life.
At a certain place in Beethoven's Ninth Symphony, for example, he might feel that he is floating above the earth in a starry dome, with the dream of immortality in his heart; all the stars seem to glimmer around him, and the earth seems to sink ever deeper downwards.
It is only great pain--that slow, sustained pain that takes its time, in which we are, as it were, burned with smoldering green firewood--that forces us philosophers to sink to our ultimate profundity and to do away with all the trust, everything good-natured, veil-imposing, mild and middling, on which we may have previously based our humanity. I doubt that such a pain makes us 'better'--but I know that it makes us deeper.