But, in the next place, your theory seems to imply the eternity of the world; and that is a principle, which, I think, can be refuted by the strongest reasons and probabilities. I shall suggest an argument to this purpose, which, I believe, has not been insisted on by any writer. Those, who reason from the late origin of arts and sciences, though their inference wants not force, may perhaps be refuted by considerations derived from the nature of human society, which is in continual revolution, between ignorance and knowledge, liberty and slavery, riches and poverty; so that it is impossible for us, from our limited experience, to foretell with assurance what events may or may not be expected. Ancient learning and history seem to have been in great danger of entirely perishing after the inundation of the barbarous nations; and had these convulsions continued a little longer, or been a little more violent, we should not probably have now known what passed in the world a few centuries before us. Nay, were it not for the superstition of the Popes, who preserved a little jargon of Latin, in order to support the appearance of an ancient and universal church, that tongue must have been utterly lost; in which case, the Western world, being totally barbarous, would not have been in a fit disposition for receiving the GREEK language and learning, which was conveyed to them after the sacking of CONSTANTINOPLE. When learning and books had been extinguished, even the mechanical arts would have fallen considerably to decay; and it is easily imagined, that fable or tradition might ascribe to them a much later origin than the true one. This vulgar argument, therefore, against the eternity of the world, seems a little precarious. But here appears to be the foundation of a better argument. LUCULLUS was the first that brought cherry-trees from ASIA to EUROPE; though that tree thrives so well in many EUROPEAN climates, that it grows in the woods without any culture. Is it possible, that throughout a whole eternity, no EUROPEAN had ever passed into ASIA, and thought of transplanting so delicious a fruit into his own country? Or if the tree was once transplanted and propagated, how could it ever afterwards perish? Empires may rise and fall, liberty and slavery succeed alternately, ignorance and knowledge give place to each other; but the cherry-tree will still remain in the woods of GREECE, SPAIN, and ITALY, and will never be affected by the revolutions of human society.