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