Here again was one, who exalted the beauty of the senses above the beauty of the soul, and so soiled the whole nature and so perverted the mind, which is the mirror of the man, that he produced a vortex of vice, in which all who entered were bewildered and lost their guiding star; in which many were utterly wrecked, and all defiled. Professor Henderson in his critical interpretation of five authors, points out so much of the evil that one can only regret that his grasp of true psychology was not deep enough to enable him to make more clear the distinction between the spiritual soul and the animal soul (not to go further into the complex nature of the Soul), the great duality in man that is the clue to all these mysteries. With this key one feels that his study of Maeterlinck's philosophy would have become more luminous, for surely this is a case, in which an author continually confuses his audience, and perhaps also himself, by exalting the sensuous joys of the animal soul, and the emotions of the imagination, above the pure joy of true beauty, which is, as all poets, not only Keats, have seen, the same as truth. Keats himself may have known the difference, but his readers certainly must in most instances have been misled and may have found in his lines a justification of their own indulgence of morbid tastes, for however morbid may be a man's condition he will still see beauty in pleasure of any kind, no matter how vile may be its source. We may endorse the axiom in the first line Beauty is truth, truth beauty but must protest against the fallacy in the next line ... that is all Ye know on earth, and all ye need to know.