and he will probably defer to it so far as to admit that he cannot prove his negative conclusion, but will add that he is not bound to do so, and that all that can be reasonably required of him is to show that the evidence adduced on the opposite side is insufficient to establish the Divine existence, or that the phenomena which supply that evidence may be as well, or more satisfactorily, explained in some other way. Assail, in like manner, the Skeptical Atheist with the self-evident truth that, even on his own principles, he is not entitled to assume or to act upon the assumption, that _there is no God_, since the result of his reasonings is _doubt_ merely, and such doubt as implies that there _may be_ a Creator, Governor, and Judge, he will probably defer to it so far as to admit that this is the only logical result of his system, but will add that, where there is no conclusive evidence on either side, there can be no moral obligation to a religious life, and no guilt in living "without God in the world." It will be found, too, that, distinct as these two forms of Speculative Atheism may appear to be, yet they have often been made to rest on a common ground, and the self-same arguments have been adduced in support of both. Thus the doctrine of Materialism, the theory of Development, and the system of Natural Laws, have all been applied by the Dogmatic Atheist to justify his denial of the existence and government of God, on the ground that all the phenomena of Nature may be accounted for without the supposition of a Supreme Mind; while the very same doctrines or theories have been also applied by the Skeptical Atheist to justify, not his _denial_, but his _doubt_, and to vindicate his verdict of "_non-liquet_" on the evidence adduced. And as the same arguments are often employed by both parties in support of their respective views, so they make use, for the most part, of the same objections in assailing the cause of Theism; insomuch that it would be impossible, and even were it possible it would be superfluous, to attempt a formal refutation of either, without discussing those more general principles which are applicable to both. For this reason, we propose to examine in the sequel the various theories which have been applied in support alike of Dogmatic and of Skeptical Atheism, so as to illustrate the grounds that are common to both, while we consider also the distinctive peculiarities of the two systems, and more particularly the grounds of Religious Skepticism.