The doctrine of necessity is stated by this author with great force and precision as a general question of cause and effect, and with scarcely any particular reference to his mechanical theory of the mind. From this naked simple view of the matter, I cannot consistently with truth withhold my full and entire assent. The ground-work, the pure basis of the doctrine is in my opinion incontestable; it cannot be denied without overturning all the rules of science, as well as the plainest dictates of the understanding: whoever attacks it there in its stronghold, will only injure the cause he espouses. It is that rock upon which whoever falls will be dashed to pieces. But though I cannot pretend to undermine the foundation, yet I may attempt to shake some parts of the superstructure, and to clear away the crust of materialism which has grown over it. In my opinion, the representations which have commonly been given of the subject by the writers on both sides of the argument are almost equally erroneous, and their opposite conclusions built on an equal misconception of the true principle of necessity. By the principle of moral or philosophical necessity is meant then that the mind is invariably governed by certain laws which determine all its operations; or in other words, that the regular succession of cause and effect is not confined to mere matter, while the impulses of the will are left quite unaccounted for, self-caused, perfectly contingent and fantastical. We in general attribute those things to chance the causes of which we do not understand, both in mind and matter. But as there is a greater latitude and inconstancy in the one than in the other, insomuch that we can hardly ever predict with certainty the effect of particular motives on the mind, the opinion of chance, arbitrary inclination, or self-determination had gained much deeper root with respect to the operations of mind than to those of matter. The fallacy of this opinion Hobbes has exposed in a masterly, and I think unanswerable manner, and without running into those paradoxical conclusions from the first position which later necessarians have deduced from it. He affirms that necessity is perfectly consistent with human liberty; that is, that the most strict and inviolable connexion of cause and effect does not prevent the full, free, and unrestrained development of certain powers in the agent, or take away the distinction between the nature of virtue and vice, praise and blame, reward and punishment, but is the foundation of all moral reasoning. Except Dr. Jonathan Edwards, he is the only professed necessarian that I know of who has not been led, by the customary use of language, to quit the original definition of the term, and to slide from a philosophical into a vulgar and practical necessity. But I will state his reasoning in his own words, which are the best. They are as follows: ‘My opinion about Liberty and Necessity.