“And of what benefit,” I asked, “will it be to you to have your name thus inscribed, when you yourself are only a ghost?” It is said that ghosts, like the gnomes, cannot speak otherwise than as they think, because they have not sense enough to prevaricate. He looked at me in surprise, and merely answered-- “Fool!” He had become so much emaciated, and his voice sounded so hollow, that I began to doubt whether he actually was the one I had known in our world; I therefore asked him who he was. “Alas!” replied the ghost mournfully, “I do not know who I am. While I was among the living I knew everything about science and philosophy, medicine and theology, spiritism and psychic research, but unfortunately I never knew myself. It is said that I made many inventions and discoveries, but as I do not know myself, I do not know who invented and discovered these things, and whether it was I or another; moreover I have forgotten them all.” “But,” I said, “why do you not try to find out who you are?” Another deep sigh expressed the profundity of his grief as he said-- “Life is short, and I have no time to attend to that matter. First, I will finish this _perpetuum mobile_, and after that I may have leisure to find out who I am and for what purpose I exist. I have now put these wheels together for the ten thousand six hundred and ninety-fifth time, and there is only one little hinge. After this business has been accomplished I will turn my attention to more serious matters.” I felt a deep pity for the ghost, in whom I now well recognised my friend, for the words spoken by him I had often heard him express before. I therefore said-- “There is nothing to be said against entering into scientific experiments and increasing one’s store of knowledge in regard to the laws of external nature and its phenomena; but a far more important thing it is to know one’s own self and the object of one’s existence, so that one may act accordingly, and make the best use of life.” “I know it,” answered the ghost, “and I often said so myself, but I have now no time to attend to philosophical questions; I must finish this wheel.” “Perhaps,” I said, “you would succeed better if you were first to learn to know your real self and its powers, and construct your wheel afterwards, if you should still think it worth the while to spend your time with such nonsense.” When I said this the ghost became very angry, and said-- “Avaunt, fool! and do not torment me. Get thee gone!” So saying, the ghost snapped his jaws at me in a furious manner, and I barely escaped having my ear bitten off. I mournfully turned away, sadly grieved that such a bright intellect should have been allowed to evaporate in dreams; but I knew that it was of no use to argue with him, for my own experience with the jumping-jack had taught me what a great power a fixed idea has over the mind.