As plants convert the minerals into food for animals, so each man converts some raw material in nature to human use. The inventors of fire, electricity, magnetism, iron, lead, glass, linen, silk, cotton; the makers of tools; the inventor of decimal notation; the geometer; the engineer; the musician, severally make an easy way for all through unknown and impossible confusions. Each man is, by secret liking, connected with some district of nature, whose agent and interpreter he is, as Linnæus, of plants; Huber, of bees; Fries, of lichens; Van Mons, of pears; Dalton, of atomic forms; Euclid, of lines; Newton, of fluxions. A man is a center for nature, running out threads of relation through everything, fluid and solid, material and elemental. The earth rolls; every clod and stone comes to the meridian; so every organ, function, acid, crystal, grain of dust, has its relation to the brain. It waits long, but its turn comes. Each plant has its parasite, and each created thing its lover and poet. Justice has already been done to steam, to iron, to wood, to coal, to loadstone, to iodine, to corn and cotton; but how few materials are yet used by our arts! The mass of creatures and of qualities are still hid and expectant. It would seem as if each waited, like the enchanted princess in fairy tales, for a destined human deliverer. Each must be disenchanted, and walk forth to the day in human shape. In the history of discovery, the ripe and latent truth seems to have fashioned a brain for itself. A magnet must be made man, in some Gilbert, or Swedenborg, or Oersted, before the general mind can come to entertain its powers. If we limit ourselves to the first advantages: a sober grace adheres to the mineral and botanic kingdoms, which in the highest moments comes up as the charm of nature, the glitter of the spar, the sureness of affinity, the veracity of angles. Light and darkness, heat and cold, hunger and food, sweet and sour, solid, liquid, and gas, circle us round in a wreath of pleasures, and, by their agreeable quarrel, beguile the day of life. The eye repeats every day the first eulogy on things--"He saw that they were good." We know where to find them; and these performers are relished all the more after a little experience of the pretending races. We are entitled, also, to higher advantages. Something is wanting to science, until it has been humanized. The table of logarithms is one thing, and its vital play, in botany, music, optics, and architecture, another. There are advancements to numbers, anatomy, architecture, astronomy, little suspected at first, when, by union with intellect and will, they ascend into the life, and reappear in conversation, character, and politics.