"This being understood, I now proceed to show you that the class of phaenomena which requires that kind of cause we denominate a Deity is exclusively given in the phaenomena of mind,--that the phaenomena of matter taken by themselves, (you will observe the qualification taken by themselves) so far from warranting any inference to the existence of a God, would, on the contrary, ground even an argument to his negation. "If, in man, intelligence be a free power,--in so far as its liberty extends, intelligence must be independent of necessity and matter; and a power independent of matter necessarily implies the existence of an immaterial subject,--that is, a spirit. If, then, the original independence of intelligence on matter in the human constitution, in other words, if the spirituality of mind in man be supposed a datum of observation, in this datum is also given both the condition and the proof of a God. For we have only to infer, what analogy entitles us to do, that intelligence holds the same relative supremacy in the universe which it holds in us, and the first positive condition of a Deity is established in the establishment of the absolute priority of a free creative intelligence."[10] Sec. 20. Thus, according to Sir W. Hamilton, the whole question as to the being of a God depends upon that as to whether our "intelligence be a free power,"--or, as he elsewhere states it himself, "Theology is wholly dependent upon Psychology, for with the proof of the moral nature of man stands or falls the proof of the existence of a Deity." It will be observed that I am not at present engaged with the legitimacy of this author's decision upon the comparative merits of the different arguments in favour of Theism: I am merely showing the high opinion he entertained of the particular argument before us. He positively affirms that, unless the freedom of the human will be a matter of experience, Atheism is the sole alternative. Doubtless most well-informed readers will feel that the solitary basis thus provided for Theism is a very insecure one, while many such readers will at once conclude that if this is the only basis which reason can provide for Theism to stand upon, Theism is without any rational basis to stand upon at all. I have no hesitation in saying that the last-mentioned opinion is the one to which I myself subscribe, for I am quite unable to understand how any one at the present day, and with the most moderate powers of abstract thinking, can possibly bring himself to embrace the theory of Free-will. I may add that I cannot but believe that those who do embrace this theory with an honest conviction, must have failed to understand the issue to which modern thought has reduced the question. Here, however, is not the place to discuss this question. It will be sufficient for my purpose to show that even Sir W. Hamilton himself considered it a very difficult one; and although he thought upon the whole