V. The manner in which Necessitarians treat facts of this kind, to wit, choosing between things perceived and felt to be equal, also demands a passing notice. Such facts are of very little importance, one way or the other, they say, in mental science. It is the height of folly to appeal to them to determine questions of such moment as the doctrine of Liberty and Necessity. I answer: Such facts are just as important in mental science, as the fall of a piece of gold and a feather, in an exhausted receiver, is in Natural Philosophy. The latter reveals with perfect clearness the great law of attraction in the material universe. The former reveals with equal conspicuousness the great law of Liberty in the realm of mind. The Necessitarian affirms, that no act of Will is possible, only in the direction of the dictates of the Intelligence, or of the strongest impulse of the Sensibility. Facts are adduced in which, from the necessity of the case, both Faculties must be in a state of perfect equilibrium. Neither can impel the Will in one direction, in distinction from the other. In such circumstances, if the doctrine of Necessity is true, no acts of Will are possible. In precisely these circumstances acts of Will do arise. The doctrine of Necessity therefore is overthrown, and the truth of that Liberty is demonstrated. So important are those facts which Necessitarians affect to despise. True philosophy, it should be remembered, never looks contemptuously upon facts of any kind. PALPABLE MISTAKE. VI. We are prepared to notice a palpable mistake into which Necessitarians have fallen in respect to the use which the advocates of the doctrine of Liberty design to make of the fact, that the Will can and does select between objects perceived and felt to be equal.