This movement of theological thought had its origin in a new science, the science of historical criticism, which had its birth in our own nineteenth century. The new science consisted simply in applying to the mass of materials on which much of ancient history had been hitherto based--myths, legends and oral traditions--the rules [15] embodying the judgment of sound discretion upon the value of different sorts of evidence. The effect of the application of this principle to the materials out of which our ancient histories were constructed, was to banish to the realms of pure myth or doubtful legend much which our fathers accepted as historical fact. The relations of ancient authors are no longer received with as ready a belief as formerly; nor are all ancient authors any longer put upon the same footing and regarded as equally credible, or all parts of their work supposed to rest upon the same basis. [16] Many old, fond theories have been shattered; in some respects the whole face of antiquity has been changed, [17] and instead of now looking upon the ancients as demi-gods, and the condition in which they lived as being something supernatural, we are made to feel that they were men of like passions with ourselves, possessed of the same weaknesses, actuated by the same motives of self interest, ambition, jealousy, love, hatred; and that the conditions surrounding them were no more supernatural than those which surround us. The science of historical criticism by the application of its main principle has stripped ancient times of their prodigies, and has either brought those demi-gods of legend to earth and made them appear very human, or has banished them entirely from real existence. So long as the leading principle of this new science was applied to profane history alone; and the revolution it inaugurated confined to smashing the myths of ancient Greece, Rome, Babylon, Egypt and India, no complaints were heard. Indeed, the work was very generally applauded. But when the same principle began to be applied to what, by Christians at least, was considered sacred history, then an exception was pleaded.