But how true it is that every pleasure has also its reverse side, in brief, its pain. Or, if not wholly true, how nearly so. Therefore, I have added to most of my pleasures the little flavour of bitterness, the flaw in their perfection, the canker in the damask, the worm at the root, the fear of loss, or of satiety, the fearful risks involved in their very existence, which tang their sweetness, and mind us of their mortality and of our own, and that nothing in this world is perfect.