5. Another of these presumptions is the belief in causation. It is to me a perplexity that grave authors seem to enunciate as an intuitive truth, that every thing must have a cause. If this were so, the voice of nature would tell false; for why in that case stop short at One, who is Himself without cause? The assent which we give to the proposition, as a first principle, that nothing happens without a cause, is derived, in the first instance, from what we know of ourselves; and we argue analogically from what is within us to what is external to us. One of the first experiences of an infant is that of his willing and doing; and, as time goes on, one of the first temptations of the boy is to bring home to himself the fact of his sovereign arbitrary power, though it be at the price of waywardness, mischievousness, and disobedience. And when his parents, as antagonists of this wilfulness, begin to restrain him, and to bring his mind and conduct into shape, then he has a second series of experiences of cause and effect, and that upon a principle or rule. Thus the notion of causation is one of the first lessons which he learns from experience, that experience limiting it to agents possessed of intelligence and will. It is the notion of power combined with a purpose and an end. Physical phenomena, as such, are without sense; and experience teaches us nothing about physical phenomena as causes. Accordingly, wherever the world is young, the movements and changes of physical nature have been and are spontaneously ascribed by its people to the presence and will of hidden agents, who haunt every part of it, the woods, the mountains and the streams, the air and the stars, for good or for evil;—just as children again, by beating the ground after falling, imply that what has bruised them has intelligence;—nor is there anything illogical in such a belief. It rests on the argument from analogy.