There are men who know a magic to drive certain flies from a house or from a garden; and it has been known to happen that one of these men was able to drive all the flies from a place in one day. It was his mind reflecting upon their little insignificant minds. The power of affecting the mind of insects is an evidence of power, not a peculiarity. No doubt the human mind is incomparably greater in power and concentration, and naturally it projects its thought upon the objects it chooses to project upon. It is only the one who knows how to focus his mind who can do so. If a man drives away flies from a place, it does not mean that he has in his mind a fly element; only that he can focus his mind upon flies, which another man would not be able to do, because a person does not generally give his thought to it. He does not imagine that such a thing could happen; and as he does not believe it, he cannot concentrate his mind on it. And even if he did reflect just for an experiment, he would not succeed.