One of the most poetical of the Upanishads, the Katha Upanishad, begins with the inquiry: "When a man dies, there is a dispute. One party declares that he has gone for ever, the other insists that he is still living. Which is true?" Various answers have been given. The whole sphere of metaphysics, philosophy, and religion is really filled with various answers to this question. At the same time, attempts have been made to suppress it, to put a stop to the unrest of mind which asks, "What is beyond? What is real?" But so long as death remains, all these attempts at suppression will always prove to be unsuccessful. We may talk about seeing nothing beyond and keeping all our hopes and aspirations confined to the present moment, and struggle hard not to think of anything beyond the world of senses; and, perhaps, everything outside helps to keep us limited within its narrow bounds. The whole world may combine to prevent us from broadening out beyond the present. Yet, so long as there is death, the question must come again and again, "Is death the end of all these things to which we are clinging, as if they were the most real of all realities, the most substantial of all substances?" The world vanishes in a moment and is gone.