The whole influence of example--and it is very strong--rests on the fact that a man has, as a rule, too little judgment of his own, and often too little knowledge, o explore his own way for himself, and that he is glad, therefore, to tread in the footsteps of some one else. Accordingly, the more deficient he is in either of these qualities, the more is he open to the influence of example; and we find, in fact, that most men's guiding star is the example of others; that their whole course of life, in great things and in small, comes in the end to be mere imitation; and that not even in the pettiest matters do they act according to their own judgment. Imitation and custom are the spring of almost all human action. The cause of it is that men fight shy of all and any sort of reflection, and very properly mistrust their own discernment. At the same time this remarkably strong imitative instinct in man is a proof of his kinship with apes. But the kind of effect which example exercises depends upon a man's character, and thus it is that the same example may possibly seduce one man and deter another. An easy opportunity of observing this is afforded in the case of certain social impertinences which come into vogue and gradually spread. The first time that a man notices anything of the kind, he may say to himself: _For shame! how can he do it! how selfish and inconsiderate of him! really, I shall take care never to do anything like that_. But twenty others will think: _Aha! if he does that, I may do it too_.