"To me this life with all its realities and functions is finally a mystery, the real something yet to be evolved, and the stamp and shape and life here somehow giving an important, perhaps the main outline to something further. Somehow this hangs over everything else, and stands behind it, is inside of all facts, and the concrete and material, and the worldly affairs of life and sense. That is the purport and meaning behind all the other meanings of Leaves of Grass." As a matter of fact, the questions of origin and destiny are beyond the grasp of the human mind. We can see a certain distance; beyond that, everything is indistinct; and beyond the indistinct is the unseen. In the presence of these mysteries--and everything is a mystery so far as origin, destiny, and nature are concerned--the intelligent, honest man is compelled to say, "I do not know." In the great midnight a few truths like stars shine on forever, and from the brain of man come a few struggling gleams of light, a few momentary sparks. Some have contended that everything is spirit; others that everything is matter; and again, others have maintained that a part is matter and a part is spirit; some that spirit was first and matter after; others that matter was first and spirit after; and others that matter and spirit have existed together. But none of these people can by any possibility tell what matter is, or what spirit is, or what the difference is between spirit and matter. The materialists look upon the spiritualists as substantially crazy; and the spiritualists regard the materialists as low and groveling. These spiritualistic people hold matter in contempt; but, after all, matter is quite a mystery. Y ou take in your hand a little earth--a little dust. Do you know what it is? In this dust you put a seed; the rain falls upon it; the light strikes it; the seed grows; it bursts into blossom; it produces fruit. What is this dust--this womb? Do you understand it? Is there anything in the wide universe more wonderful than this? Take a grain of sand, reduce it to powder, take the smallest possible particle, look at it with a microscope, contemplate its every part for days, and it remains the citadel of a secret--an impregnable fortress. Bring all the theologians, philosophers, and scientists in serried ranks against it; let them attack on every side with all the arts and arms of thought and force. The citadel does not fall. Over the battlements floats the flag, and the victorious secret smiles at the baffled hosts. Walt Whitman did not and does not imagine that he has reached the limit--the end of the road traveled by the human race. He knows that every victory over nature is but the preparation for another battle. This truth was in his mind when he said: "Understand me well; it is provided in the essence of things, that from any fruition of success, no matter what, shall come forth something to make a greater struggle necessary."