A good deal of our politics is physiological. Now and then, a man of wealth in the heyday of youth adopts the tenet of broadest freedom. In England, there is always some man of wealth and large connection planting himself, during all his years of health, on the side of progress, who, as soon as he begins to die, checks his forward play, calls in his troops, and becomes conservative. All conservatives are such from personal defects. They have been effeminated by position or nature, born halt and blind, through luxury of their parents, and can only, like invalids, act on the defensive. But strong natures, backwoodsmen, New Hampshire giants, Napoleons, Burkes, Broughams, Websters, Kossuths, are inevitable patriots, until their life ebbs, and their defects and gout, palsy and money, warp them. The strongest idea incarnates itself in majorities and nations, in the healthiest and strongest. Probably, the election goes by avoirdupois weight, and, if you could weigh bodily the tonnage of any hundred of the Whig and the Democratic party in a town, on the Dearborn balance, as they passed the hayscales, you could predict with certainty which party would carry it. On the whole, it would be rather the speediest way of deciding the vote, to put the selectmen or the mayor and aldermen at the hayscales. In science, we have to consider two things: power and circumstance. All we know of the egg, from each successive discovery, is, _another vesicle_; and if, after five hundred years, you get a better observer, or a better glass, he finds within the last observed another. In vegetable and animal tissue, it is just alike, and all that the primary power or spasm operates, is, still, vesicles, vesicles. Yes,—but the tyrannical Circumstance! A vesicle in new circumstances, a vesicle lodged in darkness, Oken thought, became animal; in light, a plant. Lodged in the parent animal, it suffers changes, which end in unsheathing miraculous capability in the unaltered vesicle, and it unlocks itself to fish, bird, or quadruped, head and foot, eye and claw. The Circumstance is Nature. Nature is, what you may do. There is much you may not. We have two things,—the circumstance, and the life. Once we thought, positive power was all. Now we learn, that negative power, or circumstance, is half. Nature is the tyrannous circumstance, the thick skull, the sheathed snake, the ponderous, rock-like jaw; necessitated activity; violent direction; the conditions of a tool, like the locomotive, strong enough on its track, but which can do nothing but mischief off of it; or skates, which are wings on the ice, but fetters on the ground.