April 2, 1864.--To-day April has been displaying her showery caprices. We have had floods of sunshine followed by deluges of rain, alternate tears and smiles from the petulant sky, gusts of wind and storms. The weather is like a spoiled child whose wishes and expression change twenty times in an hour. It is a blessing for the plants, and means an influx of life through all the veins of the spring. The circle of mountains which bounds the valley is covered with white from top to toe, but two hours of sunshine would melt the snow away. The snow itself is but a new caprice, a simple stage decoration ready to disappear at the signal of the scene-shifter. How sensible I am to the restless change which rules the world. To appear, and to vanish--there is the biography of all individuals, whatever may be the length of the cycle of existence which they describe, and the drama of the universe is nothing more. All life is the shadow of a smoke-wreath, a gesture in the empty air, a hieroglyph traced for an instant in the sand, and effaced a moment afterward by a breath of wind, an air-bubble expanding and vanishing on the surface of the great river of being--an appearance, a vanity, a nothing. But this nothing is, however, the symbol of the universal being, and this passing bubble is the epitome of the history of the world. The man who has, however imperceptibly, helped in the work of the universe, has lived; the man who has been conscious, in however small a degree, of the cosmical movement, has lived also. The plain man serves the world by his action and as a wheel in the machine; the thinker serves it by his intellect, and as a light upon its path. The man of meditative soul, who raises and comforts and sustains his traveling companions, mortal and fugitive like himself, plays a nobler part still, for he unites the other two utilities. Action, thought, speech, are the three modes of human life. The artisan, the savant, and the orator, are all three God’s workmen. To do, to discover, to teach--these three things are all labor, all good, all necessary. Will-o’-the-wisps that we are, we may yet leave a trace behind us; meteors that we are, we may yet prolong our perishable being in the memory of men, or at least in the contexture of after events. Everything disappears, but nothing is lost, and the civilization or city of man is but an immense spiritual pyramid, built up out of the work of all that has ever lived under the forms of moral being, just as our calcareous mountains are made of the debris of myriads of nameless creatures who have lived under the forms of microscopic animal life.