In short, Magnifying-glasses are like a high heel to a short legg, which if it be made too high, it is apt to make the wearer fall, and at the best, can do no more then represent exterior figures in a bigger, and so in a more deformed shape and posture then naturally they are; but as for the interior form and motions of a Creature, as I said before, they can no more represent them, then Telescopes can the interior essence and nature of the Sun, and what matter it consists of; for if one that never had seen Milk before, should look upon it through a Microscope, he would never be able to discover the interior parts of Milk by that instrument, were it the best that is in the World; neither the Whey, nor the Butter, nor the Curds. Wherefore the best optick is a perfect natural Eye, and a regular sensitive perception, and the best judg is Reason, and the best study is Rational Contemplation joyned with the observations of regular sense, but not deluding Arts