This process of perversion and of induration may as readily have place among the religious emotions as among those of any other class; for the laws of human nature are uniform, whatever may be the immediate cause which puts them in action; and a fictitious piety corrupts or petrifies the heart not less certainly than does a romantic sentimentality. The danger attending enthusiasm in religion is not, then, of a trivial sort; and whoever disaffects the substantial matters of Christianity, and seeks to derive from it merely, or chiefly, the gratifications of excited feeling; whoever combines from its materials a paradise of abstract contemplation, or of poetic imagery, where he may take refuge from the annoyances and the importunate claims of common life; whoever thus delights himself with dreams, and is insensible to realities, lives in peril of awaking from his illusions when truth comes too late. The religious idealist sincerely believes himself, perhaps, to be eminently devout; and those who witness his abstraction, his elevation, his enjoyments, may reverence his piety; meanwhile, this fictitious happiness creeps as a lethargy through the moral system, and is rendering him, continually, less and less susceptible of those emotions in which true religion consists. Nor is this always the limit of the evil; for though religious enthusiasm may sometimes seem a harmless delusion, compatible with amiable feelings and virtuous conduct, it more often allies itself with the malign passions, and then produces the virulent mischiefs of fanaticism. Opportunity may be wanting, and habit may be wanting, but intrinsic qualification for the perpetration of the worst crimes is not wanting to the man whose bosom heaves with religious enthusiasm, inflamed by malignancy. If checks are removed, if incitements are presented, if the momentum of action and custom is acquired, he will soon learn to contemn every emotion of kindness or of pity, as if it were a treason against heaven, and will make it his ambition to rival the achievements, not of heroes, but of fiends. The amenities that have been diffused through society in modern times forbid the overt acts and excesses of fanatical feeling; but the venom still lurks in the vicinity of enthusiasm, and may be quickened in a moment meantime, while smothered and repressed, it gives edge and spirit to those hundred religious differences which are still the opprobrium of Christianity. Whoever, then, admits into his bosom the artificial fire of an imaginative piety, ought first to assure himself that his heart harbors no particle of the poison of ill-will. * * * * *