Having thought it right to leave behind me some account of my friends and benefactors, it is in a manner necessary that I also give some account of m… - Joseph Priestley

Mr. Gibbon has much to learn concerning the gospel before he can be properly qualified to write against it. Hitherto he seems to have been acquainted with nothing but the corrupt establishments of what is very improperly called Christianity; whereas it is incumbent upon him to read and study the New Testament for himself. There he will find nothing like Platonism, but doctrines in every respect the reverse of that system of philosophy, which weak and undistinguishing christians afterwards incorporated with it. Had Mr. Gibbon lived in France, Spain, or Italy, he might with the same reason have ranked the doctrine of transubstantiation, and the worship of saints and angels among the essentials of Christianity, as the doctrines of the trinity and of the atonement.

Great as Bacon was, he was far from being free from the mistakes and prejudices of those who went before him. Even some of the most wild and absurd opinions of the antients have the sanction of his approbation and authority. He does not hesitate to assent to an opinion... that visual rays proceed from the eye; giving this reason for it, that every thing in nature is qualified to discharge its proper functions by its own powers, in the same manner as the sun, and other celestial bodies. He acknowledges, however, that the presence of light, as well as several other circumstances, is necessary to vision.

Contemporary with Vitellio and Peccam was... Roger Bacon, a man of almost universal genius, and who wrote on almost every branch of science. He frequently quotes Alhazen on the subject of optics, and seems to have carefully studied his writings, as well as those of other Arabians, which were the fountains of natural knowledge in those days, and which had been introduced into Europe by means of the Moors in Spain. Notwithstanding the pains this great man took with the subject of opticks, it does not appear that, with respect to theory, he made any considerable advance upon what Alhazen had done before him.