The author then enlarges, first, on the advantage of a revelation, and particularly of the Christian, and on the use and evidence of miracles. The main argument of his opponent's treatise, as its title implies, was intended to shew that the doctrines and principles of Christianity, in as far as they are just and rational, are such as men might have discovered for themselves; and, in fact, had in many instances ascertained and acknowledged. To this it is justly replied, that even if all this were granted, it would not prove a revelation superfluous, if it appears that mankind had placed themselves in such circumstances, that prevailing ignorance, the force of unconquerable prejudices, idolatry, superstition, and wickedness, had depraved their minds and perverted their understandings. Whatever might be the natural powers of the human understanding, or whatever might be the cause of the delusion and ignorance under which men almost universally laboured, it must, at least, be admitted that these lamentable effects did exist; that as long as they existed, they were inconsistent with the true improvement and happiness of man, and therefore it is consistent with our views of divine