Then if we go to others, that is, to the subjects of influence, we find every man endowed with two inlets of impression; the ear and the understanding for the reception of speech, and the sympathetic powers, the sensibilities or affections, for tinder to those sparks of emotion revealed by looks, tones, manners and general conduct. And these sympathetic powers, tho not immediately rational, are yet inlets, open on all sides, to the understanding and character. They have a certain wonderful capacity to receive impressions, and catch the meaning of signs, and propagate in us whatsoever falls into their passive molds from others. The impressions they receive do not come through verbal propositions, and are never received into verbal propositions, it may be, in the mind, and therefore many think nothing of them. But precisely on this account are they the more powerful, because it is as if one heart were thus going directly into another, and carrying in its feelings with it. Beholding, as in a glass, the feelings of our neighbor, we are changed into the same image, by the assimilating power of sensibility and fellow-feeling. Many have gone so far, and not without show, at least, of reason, as to maintain that the look or expression, and even the very features of children, are often changed by exclusive intercourse with nurses and attendants. Furthermore, if we carefully consider, we shall find it scarcely possible to doubt, that simply to look on bad and malignant faces, or those whose expressions have become infected by vice, to be with them and become familiarized to them, is enough permanently to affect the character of persons of mature age. I do not say that it must of necessity subvert their character, for the evil looked upon may never be loved or welcomed in practise; but it is something to have these bad images in the soul, giving out their expressions there, and diffusing their odor among the thoughts, as long as we live. How dangerous a thing is it, for example, for a man to become accustomed to sights of cruelty? What man, valuing the honor of his soul, would not shrink from yielding himself to such an influence? No more is it a thing of indifference to become accustomed to look on the manners, and receive the bad expression of any kind of sin. The door of involuntary communication, I have said, is always open. Of course we are communicating ourselves in this way to others at every moment of our intercourse or presence with them. But how very seldom, in comparison, do we undertake by means of speech to influence others! Even the best Christian, one who most improves his opportunities to do good, attempts but seldom to sway another by voluntary influence, whereas he is all the while shining as a luminous object unawares, and communicating of his heart to the world.