Nor is it the least tragic accompaniment of this process that its effects may even be concealed from others. The soul undergoing Degeneration, surely by some arrangement with Temptation planned in the uttermost hell, possesses the power of absolute secrecy. When all within is festering decay and rottenness, a Judas, without anomaly, may kiss his Lord. This invisible consumption, like its fell analogue in the natural world, may even keep its victim beautiful while slowly slaying it. When one examines the little _Crustacea_ which have inhabited for centuries the lakes of the Mammoth Cave of Kentucky, one is at first astonished to find these animals apparently endowed with perfect eyes. The pallor of the head is broken by two black pigment specks, conspicuous indeed as the only bits of color on the whole blanched body; and these, even to the casual observer, certainly represent well-defined organs of vision. But what do they with eyes in these Stygian waters? There reigns an everlasting night. Is the law for once at fault? A swift incision with the scalpel, a glance with a lens, and their secret is betrayed. The eyes are a mockery. Externally they are organs of vision--the front of the eye is perfect; behind, there is nothing but a mass of ruins. The optic nerve is a shrunken, atrophied and insensate thread. These animals have organs of vision, and yet they have no vision. They have eyes, but they see not. Exactly what Christ said of men: They had eyes, but no vision. And the reason is the same. It is the simplest problem of natural history. The _Crustacea_ of the Mammoth Cave have chosen to abide in darkness. Therefore they have become fitted for it. By refusing to see they have waived the right to see. And Nature has grimly humored them. Nature had to do it by her very constitution. It is her defence against waste that decay of faculty should immediately follow disuse of function. He that hath ears to hear, he whose ears have not degenerated, let him hear. Men tell us sometimes there is no such thing as an atheist. There must be. There are some men to whom it is true that there is no God. They cannot see God because they have no eye. They have only an abortive organ, atrophied by neglect.