Law, it was justly observed by Dr. Cudworth,[23] could not be the original source of those distinctions; since upon the supposition of such a law, it must either be right to obey it, and wrong to disobey it, or indifferent whether we obeyed it, or disobeyed it. That law which it was indifferent whether we obeyed or disobeyed, could not, it was evident, be the source of those distinctions; neither could that which it was right to obey and wrong to disobey, since even this still supposed the antecedent notions or ideas of right and wrong, and that obedience to the law was conformable to the idea of right, and disobedience to that of wrong. Footnote 23: Immutable Morality, l. 1. Since the mind, therefore, had a notion of those distinctions antecedent to all law, it seemed necessarily to follow, that it derived this notion from reason, which pointed out the difference between right and wrong, in the same manner in which it did that between truth and falsehood: and this conclusion, which though true in some respects, is rather hasty in others, was more easily received at a time when the abstract science of human nature was but in its infancy, and before the distinct offices and powers of the different faculties of the human mind had been carefully examined and distinguished from one another. When this controversy with Mr. Hobbes was carried on with the greatest warmth and keenness, no other faculty had been thought of from which any such ideas could possibly be supposed to arise. It became at this time, therefore, the popular doctrine, that the essence of virtue and vice did not consist in the conformity or disagreement of human actions with the law of a superior, but in their conformity or disagreement with reason, which was thus considered as the original source and principle of approbation and disapprobation.