If the imaginations of men were the same, the chimeras which they bring forth would be every where the same; there would be no disputes among them on this subject, if they all dreamt in the same manner; great numbers of human beings would be spared, if man occupied his mind with objects capable of being known, of which the existence was proved, of which he was competent to discover the true qualities, by sure, by reiterated experience. _Systems of Philosophy_ are not subject to dispute but when their principles are not sufficiently proved; by degrees experience, in pointing out the truth and detecting their errors, terminates these quarrels. There is no variance among _geometricians_ upon the principles of their science; it is only raised, when their suppositions are false, or their objects too much complicated. _Theologians_ find so much difficulty in agreeing among themselves, simply, because, in their contests, they divide without ceasing, not known and examined propositions, but prejudices with which they have been imbued in their youth--in the schools--by each other's books, &c. They are perpetually reasoning, not upon real objects, of which the existence is demonstrated, but upon imaginary systems of which they have never examined the reality; they found these disputes, not upon averred experience, or constant facts, but upon gratuitious suppositions, which each endeavours to convince the other are without solidity. Finding these ideas of long standing, that few people, refuse to admit them, they take them for incontestible truths, that ought to be received merely upon being announced; whenever they attach great importance to them, they irritate themselves against the temerity of those who have the audacity to doubt, or even to examine them.
If prejudice had been laid aside, it would perhaps have been discovered that many of those objects, which have given birth to the most shocking, the most sanguinary disputes among men, were mere phantoms; which a little examination would have shown to be unworthy their notice: _the priests of Apollo_ would have been harmless, if man had examined for himself, without prejudice, the tenets they held forth: he would have found, that he was fighting, that he was cutting his neighbour's throat, for words void of sense; or, at the least, he would have learned to doubt his right to act in the manner he did; he would have renounced that dogmatical, that imperious tone he assumed, by which he would oblige his fellow to unite with him in opinion. The most trifling reflection would have shewn him the necessity of this diversity in his notions, of this contrariety in his imagination, which depends upon his Natural conformation diversely modified: which necessarily has an influence over his thoughts, over his will, and over his actions. In short, if he had consulted morals, if he had fallen back upon reason, every thing would have conspired to prove to him, that beings who call themselves rational, were made to think variously; on that account were designed to live peaceable with each other, to love each other, to lend each other mutual succours whatever may be their opinions upon subjects, either impossible to be known, or to be contemplated under the same point of view: every thing would have joined in evidence to convince him of the unreasonable tyranny, of the unjust violence, of the useless cruelty of those men of blood, who persecute, who destroy mankind, in order that they may mould him to their own peculiar opinions; every thing would have conducted mortals to _mildness_, to _indulgence_, to _toleration_; virtues, unquestionably of more real importance, much more necessary to the welfare of society, than the marvellous speculations by which it is divided, by which it is frequently hurried on to sacrifice to a maniacal fury, the pretended enemies to these revered flights of the imagination.