made, are in their very nature essentially different from the evidences of natural philosophy, chemistry, &c. For these are founded in immutable principles which never vary, and are ever open at all times to thorough investigation and experiment. Hence if the learned have any doubts on the subject, those doubts may be removed by occular demonstration; and even when they are enabled by any new discoveries to correct some former opinions, which were either founded on mere conjecture or imperfect reasoning, yet the first principles still remain, and the former evidences, instead of being weakened, are increased by every new discovery or experiment in the developement of truth. But not so with evidences of divine revelation. Although ever so clear at first, and so well supported by facts, concerning which the witness had the clearest evidence, yet the evidences being of such a nature as preclude a repetition, like those respecting a vision of the night or any other phenomenon, are liable to suffer by passing from one to another, and also to be impaired by every change which they are caused to pass. And if the evidences of any fact may be weakened at all, either by lapse of time, or by passing through different hands; by the same causes, if continued, they may lose all their strength. That the evidences of some facts may be thus weakened, I believe will not be denied. Hence what was once clear may be now doubtful, and in process of time may become entitled to no credit. If therefore the evidence of revelation either have been, or ever shall by any circumstances whatever be thus impaired, then a new revelation may become necessary either to revive or to strengthen the evidences of the old. If Christ should make his second appearance, according to the opinions of some, it would be as much of a revelation as his first appearance was; and this new revelation would corroborate and confirm the old; but if nothing of the kind should ever take place, and if there should be nothing more to confirm the validity of prophesy, but let the world pass on for several thousand years as we know it has for fifteen hundred years past, how long will either the Jews or christians believe in divine revelation? "I believe however, we had better see whether the old revelation can be fully proved before we go very far into the inquiry whether a new one is necessary.