It is a commonplace remark that "a man's faculties are strengthened by use, and weakened by disuse." To change the form of statement, they grow when they are fed and nourished, and decay when they are not fed and nourished. Moreover, every faculty demands appropriate food. What nourishes one will not always nourish another. Accordingly, one part of man's nature may grow while another withers; and one part may be fed and strengthened at the expense of another. In Hawthorne's beautiful allegory, the "Great Stone Face," you remember how the man Ernest, by daily and admiring contemplation of the face, its dignity, its serenity, its benevolence, came, all unconsciously to himself, to possess the same qualities, and to be transformed by them, until at last he stood revealed to his neighbors as the long promised one, who should be like the Great Stone Face. So in every human life, the unrealized self is the unseen but all-powerful force that brings into subjection the will, guides the conduct, and determines the character. "The early life of Washington is singularly transparent as to the creation and influence of the ideal. We see how one quality after another was added, until the character became complete. Manly strength, athletic power and skill, appear first; then, courtesy and refined manners; then, careful and exact business habits; then, military qualities; then, devotion to public service." Steadily, but rapidly, the transforming work went on, until the man was complete; the ideal was realized. Henceforth, the character, the man, appears under all the forms of occupation and office. Legislator, commander, president; the man is in them all, though he is none of them. Half the blunders of humanity come from not knowing one's self. If we overrate our abilities, we attempt more than we can accomplish; if we underrate our abilities we fail to accomplish much that we attempt. In both cases the life loses just so much from its sum of power. He who might wield the golden scepter of the pen, never gets beyond the plow; or perhaps he who ought to be a shoemaker attempts the artistic career of an Apelles. When a life-work presents itself we ought to be able from our self-knowledge to say, "I am, or am not, fitted to be useful in that sphere." Sydney Smith represents the various parts in life by holes of different shapes upon a table--some circular, some triangular, some square, some oblong--and the persons acting these parts, by bits of wood of similar shapes, and he says, "we generally find that the triangular person has gotten into the square hole, the oblong into the triangular, and a square fellow has squeezed into the round hole."