[Footnote 94: Tyndall answered to this argument that the flash of light from the union of oxygen and hydrogen "is an affair of consciousness, the objective counterpart of which is a vibration. It is a flash only by our interpretation." But that is no answer at all. Tyndall never went into the psychological problem fully.] Any one who desires to obtain in a short time by dint of close attention a notion of the difficulty and complexity of the argument as between monism and dualism cannot do better than read the report of the debate between Bradlaugh and the Rev. Mr Westerby on the notion of Soul. Mr Westerby, though he wrote some of his papers in advance instead of meeting his opponent's case, was decidedly the ablest of the clerics with whom Bradlaugh debated; and in his hands the orthodox cause suffered as little as might be. The reader may or may not in the end decide to stand with Bradlaugh, but he will certainly have learned to see the folly of the cheap journalistic dismissal of an undefined "Materialism" as "exploded," and the error of the notion that Bradlaugh was unqualified to handle philosophic and scientific issues, or that he was a mere public speaker, unskilled in dialectic. Finally, as to the meaningless expression that "things happen by chance," he of course never used it. Of any person who puts this phrase in the mouths of Atheists, it may be said at once that he is unfit to discuss a philosophical question. He either does not understand what he discusses, or is wilfully untruthful. The phrase "happens by chance"--as was long ago recognised by Hume, after he had himself fallen into the ordinary meaningless use of the term--only means either "happens without our intending it," or "happens without our being able to trace the cause." It is significant only for everyday purposes, and in philosophy can only serve to set up a chimera. All events must be conceived as having a "cause," in the ordinary sense of the term. The Atheist certainly avows that he can only trace causation a small way in the universe; but he does not for a moment suppose that he would be giving an explanation of any event if he referred it to "Chance." His doctrine is that the universe and its total energy must be conceived as infinite and eternal; that in physics the question "Why?" resolves itself into the question "How?" and that the business of science is just to give the answer as fully as may be. §4. While Bradlaugh was thus an exact thinker and reasoner, he distinguished himself above all the rationalists of his time by the energy and persistence with which he sought to bring his philosophy home to the popular mind. He was fundamentally a reformer, and he could not consent, as so many do, to keep silence on errors of creed, so called, and resist merely errors of action. For him, creed was action, and action creed. He was so thoroughly a man of action that he must needs act on his conviction in matters of opinion, so called, as in anything else.