Supposing this to be the case, how has it happened, it may be asked, that the argument of the necessitarian has appeared so conclusive to himself, as well as unanswerable to others? The reason is plain. Having set out with a proposition, which is barren of all consequences, as the basis of his argument, it became necessary, in order to arrive at the destined conclusion, to assume, somewhere and somehow, in the course of his reasoning, the very point which he had undertaken to prove. Accordingly, this has been done; and the tacit assumption of the point in dispute seems not to have been suspected by him. The justice of this remark may be shown, by a reference to the argument of the necessitarian. When this is reduced to the form of a syllogism, it stands thus: Every effect has a cause; a volition is an effect; and, therefore, a volition has a cause. In the middle term, which assumes that a volition is an effect, the point in dispute is taken for granted, the whole question is completely begged. If we take the words in any sense, yet as they are correlative terms, the maxim that every effect must have a cause is self-evident; and hence, no conclusion can be drawn from it, unless the conclusion intended to be drawn is assumed in the middle term of the syllogism. It either begs the question, or it decides nothing to the purpose. It is true, that every change in nature must have a cause; that is to say, it is in some sense of the word an effect, and consequently must have a corresponding cause; but in what sense does every act of the mind come under the idea and definition of an effect? This is the question. Is it brought to pass by the prior action of motive? Is it necessitated? Upon this precise question, the maxim that every change must have a cause can throw no light; it only seems to refer to this point, by means of the very convenient ambiguity of the terms in which it is expressed. The necessitarian never fails to avail himself of this ambiguity. He seems both to himself and to the spectator to be carrying on a "great demonstration;" and this is one reason, perhaps, why the mind is diverted from the sophistical tricks, the metaphysical jugglery, by which both are deceived. Let us look a little more narrowly at this pretended demonstration.