I have quoted these passages at length, because they convey in a more forcible, guarded, and accurate manner than any others with which I am acquainted, the strictly rational standing of this great subject prior to the date at which the above-quoted passage was written. Therefore, as I have said, if it had been my lot to have lived in the last generation, I should certainly have rested in these "sublime conceptions" as in an argument supreme and irrefutable. I should have felt that the progress of physical knowledge could never exert any other influence on Theism than that of ever tending more and more to confirm that magnificent belief, by continuously expanding our human thoughts into progressively advancing conceptions, ever grander and yet more grand, of that tremendous Origin of Things--the Mind of God. Such would have been my hope--such would have been my prayer. But now, how changed! Never in the history of man has so terrific a calamity befallen the race as that which all who look may now behold advancing as a deluge, black with destruction, resistless in might, uprooting our most cherished hopes, engulfing our most precious creed, and burying our highest life in mindless desolation. Science, whom erstwhile we thought a very Angel of God, pointing to that great barrier of Law, and proclaiming to the restless sea of changing doubt, "Hitherto shalt thou come, but no further, and here shall thy proud waves be stayed,"--even Science has now herself thrown down this trusted barrier; the flood-gates of infidelity are open, and Atheism overwhelming is upon us. Sec. 30. All and every law follows as a necessary consequence from the persistence of force and the primary qualities of matter.[20] That this must be so is evident if we consider that, were it not so, force could not be permanent nor matter constant. For instance, if action and reaction were not invariably equal and opposite, force would not be invariably persistent, seeing that in no case can the formula fail, unless some one or other of the forces concerned, or parts of them, disappear. And as with a simple law of this kind, so with every other natural law and inter-operation of laws, howsoever complex such inter-operation may be; for it is manifest that if in any case similar antecedents did not determine similar consequents, on one or other of these occasions some quantum of force, or of matter, or of both, must have disappeared--or, which is the same thing, the law of causation cannot have been constant. Every natural law, therefore, may be defined as the formula of a sequence, which must either ensue upon certain forces of a given intensity impinging upon certain given quantities, kinds, and forms of matter, or else, by not ensuing, prove that the force or the matter concerned were not of a permanent nature.