On the strength of this performance he might fitly be termed the most ill-conditioned sophist of his age, were it not for the perception that religious feeling in him has become a pathological phase, and that he suffers incomparably more from his own passions than he can inflict on his enemies by his eager thrusts at them. More than almost any gifted pietist of modern times he sets us wondering at the power of creed in certain cases to overgrow judgment and turn to naught the rarest faculties. No man in Berkeley's day had a finer natural lucidity and suppleness of intelligence; yet perhaps no polemist on his side did less either to make converts or to establish a sound intellectual practice. Plain men on the freethinking side he must either have bewildered by his metaphysic or revolted by his spite; while to the more efficient minds he stood revealed as a kind of inspired child, rapt in the construction and manipulation of a set of brilliant sophisms which availed as much for any other creed as for his own. To the armoury of Christian apologetic now growing up in England he contributed a special form of the skeptical argument: freethinkers, he declared, made certain arbitrary or irrational assumptions in accepting Newton's doctrine of fluxions, and it was only their prejudice that prevented them from being similarly accommodating to Christian mysteries. [766] It is a kind of argument dear to minds pre-convinced and incapable of a logical revision, but worse than inept as against opponents; and it availed no more in Berkeley's hands than it had done in those of Huet. [767] To theosophy, indeed, Berkeley rendered a more successful service in presenting it with the no better formula of "existence [i.e., in consciousness] dependent upon consciousness"--a verbalism which has served the purposes of theology in the philosophic schools down till our own day. For his, however, the popular polemic value of such a theorem must have been sufficiently countervailed by his vehement championship of the doctrine of passive obedience in its most extreme form--"that loyalty is a virtue or moral duty; and disloyalty or rebellion, in the most strict and proper sense, a vice or crime against the law of nature." [768]