It answers every appeal to that evidence by saying that, however satisfactory it may be to the minds of some, it does not carry conviction to the minds of all, and that for this reason it may be justly regarded as doubtful or inconclusive.

These two forms of Atheism--the Dogmatic and the Skeptical--are widely different from each other; they rest on distinct grounds, and they require, therefore, to be discussed separately, each on its own peculiar and independent merits.
The Dogmatic Atheist feels no force in the arguments which are directed merely against his skeptical ally; for, strong in his own position and confident in his ability to maintain it, he is conscious of no speculative doubt, and affirms boldly what he unhesitatingly believes.
The Skeptical Atheist, again, feels no force in the arguments which are directed against a Dogmatic System such as he utterly disclaims; he is equally unwilling to affirm either that there is, or that there is not, a God: he takes refuge in doubt, and refuses alike to affirm or to deny; his only plea is, the want or the weakness of evidence on either side.
From this radical difference between the two forms of Speculative Atheism, there arises a necessity for discussing each of them on its own merits; and yet, although theoretically they may be easily distinguished, it will be found that practically they are often conjoined, since the same mind will often fluctuate between the two, and shift its ground by betaking itself alternately to the one or the other, according to the exigencies of the argument.

Assail the Dogmatic Atheist with the unanswerable statement of John Foster, that it would require nothing less than Omniscience to warrant the denial of a God, 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.