When we strike the great vital currents or laws,--the law of growth, of decay, of health and disease, of reproduction, of evolution,--we strike the region of true analogy. These laws must be continuous throughout nature. All phases of development must be analogous. The mind grows with the body and is under the same law. Exercise is the same to both. Each has its appetites. Each has its tonics and stimulants. All beginnings are the same; that is, from a germ. Language must have begun in the most rudimentary sounds. Art, we know, began in the most rude and simple marks and signs; science in the crudest, simplest facts; religion in childish superstition; and so on through the whole scope of human development. Development is always from the simple to the complex. There is, no doubt, a deep-seated analogy between the growth of the individual and the growth of the state or nation; between revolutions in history, and storms and convulsions in nature. We speak of the root of the matter; everything really has its root, its obscure beginning, its hidden underground processes. There are types and suggestions everywhere--fresh fuel checks the fire; the soft stone cuts the steel the fastest; the first big drops of the shower raise the dust. The analogy between the development of animal life upon the earth and the growth of organized communities seems complete. In the lower forms of life, there is no specialization, or division of functions. The amœba can move, feel, digest, reproduce in every part of its structure; it is not differentiated or specialized; so in the rudest tribes, there is little division of labor. As animal life develops, each part of the body has a function of its own; and as communities develop, extreme specialization takes place. Organic life goes from the simple to the complex, as does progress in human affairs. This is the law of all growth.