An objection which is brought by Necessitarians, in perpetual bar of an appeal to consciousness, to determine the fact whether the phenomena of the Will fall under the relation of Liberty or Necessity, here demands special attention. Consciousness, it is said, simply affirms, that, in given circumstances, we do, in fact, put forth certain acts of Will. But whether we can or cannot, in these circumstances, put forth other and opposite determinations, it does not and cannot make any affirmation at all. It does not, therefore, fall within the province of Consciousness to determine whether the phenomena of the Will are subject to the relation of Liberty or Necessity; and it is unphilosophical to appeal to that faculty to decide such a question. This objection, if valid, renders null and void much of what has been said upon this subject; and as it constitutes a stronghold of the Necessitarian, it becomes us to examine it with great care. In reply, I remark,

1. That if this objection holds in respect to the phenomena of the Will, it must hold equally in respect of those of the other faculties the Intelligence, for example. We will, therefore, bring the objection to a test, by applying it to certain intellectual phenomena. We will take, as an example, the universal and necessary affirmation, that “it is impossible for the same thing, at the same time, to be and not to be.” Every one is conscious, in certain circumstances, of making this and other kindred affirmations. Now, if the objection under consideration is valid, all that we should be conscious of is the fact, that, under the circumstances supposed, we do, in reality, make particular affirmations; while, in reference to the question, whether, in the same circumstances, we can or cannot make different and opposite affirmations, we should have no consciousness at all. Now, I appeal to every man, whether, when he is conscious of making the affirmation, that it is impossible for the same thing, at the same time, to be and not to be, he is not equally conscious of the fact, that it is impossible for him to make the opposite affirmation whether, when he affirms that three and two make five, he is not conscious that it is impossible for him to affirm that three and two are six? In other words, when we are conscious of making certain intellectual affirmations, are we not equally conscious of an impossibility of making different and opposite affirmations? Every man is just as conscious of the fact, that the phenomena of his Intelligence fall under the relation of Necessity, as he is of making any affirmations at all. If this is not so, we cannot know but that it is possible for us to affirm and believe perceived contradictions. All that we could say is, that, as a matter of fact, we do not do it. But whether we can or cannot do it, we can never know. Do we not know, however, as absolutely as we know anything, that we cannot affirm perceived contradictions? In other words, we do and can know absolutely, that our Intelligence is subject to the law of Necessity. We do know by consciousness, with absolute certainty, that the phenomena of the Intelligence, and I may add, of the Sensibility too, do fall under the relation of Necessity. Why may we not know, with equal certainty, whether the phenomena of the Will do or do not fall under the relation of Liberty? What then becomes of the objection under consideration?

2. But while we are conscious of the fact, that the Intellect is under the law of Necessity, we are equally conscious that Will is under that of Liberty. We make intellectual affirmations; such, for example, as the propositions, Things equal to the same things are equal to one another, There can be no event without a cause, &c., with a consciousness of an utter impossibility of making different and opposite affirmations. We put forth acts of Will with a consciousness equally distinct and absolute, of a possibility, in the same circumstances, of putting forth different and opposite determinations. Even Necessitarians admit and affirm the validity of the testimony of consciousness in the former instance. Why should we doubt or deny it in the latter?

3. The question, whether Consciousness can or cannot give us not only mental phenomena, but also the fundamental characteristics of such phenomena, cannot be determined by any pre-formed theory, in respect to what Consciousness can or cannot affirm. If we wish to know to what a witness is able to testify, we must not first determine what he can or cannot say, and then refuse to hear anything from him, except in conformity to such decisions. We must first give him a full and attentive hearing, and then judge of his capabilities. So in respect to Consciousness. If we wish to know what it does or does not, what it can or cannot affirm, we must let it give its full testimony, untrammelled by any pre-formed theories. Now, when the appeal is thus made, we find, that, in the circumstances in which we do originate given determinations, it affirms distinctly and absolutely, that, in the same identical circumstances, we might originate different and opposite determinations. From what Consciousness does affirm, we ought surely to determine the sphere of its legitimate affirmations.

4. The universal solicitude of Necessitarians to take the question under consideration from the bar of Consciousness is, in fact, a most decisive acknowledgment, on their part, that at that tribunal the cause will go against them. Let us suppose that all men were as conscious that their Will is subject to the law of Necessity, as they are that their Intelligence is. Can we conceive that Necessitarians would not be as solicitous to carry the question directly to the tribunal of Consciousness, as they now are to take it from that tribunal? When all men are as conscious that their Will is under the law of Liberty, as they are that their other faculties are under the relation of Necessity, no wonder that Necessitarians anticipate the ruin of their cause, when the question is to be submitted to the bar of Consciousness. No wonder that they so solemnly protest against an appeal to that tribunal. Let the reader remember, however, that the moment the validity of the affirmations of Consciousness is denied, in respect to any question in mental science, it becomes infinite folly in us to reason at all on the subject; a folly just as great as it would be for a natural philosopher to reason about colors, after denying the validity of all affirmations of the eye, in respect to the phenomena about which he is to reason.