38. No man who is in the delights of the lusts of evil can know anything of the delights of the affections of good in which the angelic heaven is; for these two kinds of delight are absolutely opposite to each other in internals, and consequently are opposite interiorly in externals, although indeed they differ but little on the surface. For every love has its own delights; even the love of evil has these in men who are in lusts, as the love of committing adultery, of taking revenge, defrauding, stealing, acting cruelly, and in the most wicked, even the love of blaspheming the holy things of the Church and of pouring out their venom against God. The source of these delights is the love of ruling from self-love. They spring from the lusts that beset the interiors of the mind. From the interiors they flow down into the body, and there they excite the unclean things that titillate the sensory nerves (fibrae); and thus bodily pleasure arises from the mind's delight according to its lusts.
 It is granted to everyone after death, in the spiritual world, to know what these unclean things are, and their nature, which titillate the sensory nerves of such men. They are, after their kind, filthy, foul-smelling, urinous, reeking of the charnel-house and of the dung-hill; for the hells in which these men dwell abound in such unclean things. These are correspondences, as may be seen in the treatise THE DIVINE LOVE AND WISDOM (n. 422-424). These filthy delights, however, are changed into dreadful experiences when such men have entered hell. This has been recorded that it may be understood what the happiness of heaven is, and the nature of it, about which something will now be said in what follows; for everything is known from its opposite.