But yesterday has its uses, of more value than its idolatries. Though too often with its aerial distances and borrowed hues it is a mere pleasure region, instead of that great reservoir from which we might draw fountains of inexhaustible treasure, yet, if we cultivated our present from our past, homage to it might be as much to the purpose at least as the Gheber's worship of the sun. The past is an atmosphere weighing over each man's life. The skilful farmer with his subsoil-plough lets down the wealthy air of the actual atmosphere into his furrows, deeper than it ever went before; the greedy loam sucks in the nitrogen there, and one day he finds his mould stored with ammonia, the great fertilizer, worth many a harvest. Are they numerous who thus enrich the present with the disengaged agents of the past, the chemic powers obtained from that superincumbent atmosphere ever elastically stretching over them? Let our farmer scatter pulverized marble upon his soil forever,--crude carbonate of lime,--and it remains unassimilated; but let him powder burnt bones there, and his crop uses it to golden advantage,--now merely the phosphate of lime, but material that has passed through the operations of animal life, of organism. With whatever manure he work his land, be it wood-ashes or guano or compost, he knows that that which has received the action of organic tissues fattens it the best; and so a wise man may fertilize to-day better with the facts of an experience that he has once lived through, than with any vague and unorganized dreams. But the fool has never lived;--life, said Bichat, is the totality of the functions;--his past has endured no more organization than his future has; he never understood it; he can make no use of it; so he deifies it, and burns the flying moment like a joss-stick before the wooden image in which he has caricatured all its sweet and beneficent capabilities;--as if it were likely that one moment of his existence could be of any more weight than another.