Those who confirm themselves in favor of the Divine give attention to the wonders which are displayed in the production of animals; to mention here only, in reference to eggs, how the chick in its seed or beginning lies hidden therein, with everything requisite till it is hatched, also with everything pertaining to its subsequent development, until it becomes a bird or winged thing of the same form as its parent. And if one observes the living form, it is such as to fill any one with astonishment who thinks deeply, seeing that in the minutest as in the largest living creatures, even in the invisible, as in the visible, there are the organs of sense, namely, sight, hearing, smell, taste, and touch; and organs of motion which are muscles, for they fly and walk; also viscera surrounding the heart and lungs, which are set in action by brains. That even the commonest insects enjoy such organisms is shown in their anatomy as described by some writers, and especially by Swammerdam, in his Biblia Naturae. Those who ascribe everything to nature, see all these things, but they merely perceive that they exist, and say that nature produces them. They say this because they have turned their minds away from thinking about the Divine; and those who have done this are unable, when they see the wonderful things in nature, to think rationally, still less spiritually; but they think sensually and materially; and then they think in nature from nature, and not above nature, just as those do who are in hell. They differ from beasts only in having the power to think rationally, that is, in being able to understand, and therefore to think otherwise, if they choose. 352. Those who have averted themselves from thinking about the Divine when observing the wonderful things in nature, and who thereby become sensual, do not reflect that the sight of the eye is so gross as to see many little insects as an obscure speck, when yet each one of these is organized to feel and to move, and is accordingly furnished with fibers and vessels, also with a minute heart, pulmonary tubes, viscera, and brains; also that these organs are woven out of the purest substances in nature, their tissues corresponding to that somewhat of life by which their minutest parts are separately moved. When the sight of the eye is so gross that many such creatures, with innumerable particulars in each, appear to it as an obscure speck, and yet those who are sensual think and judge by that sight, it is clear how dulled their minds are, and therefore what thick darkness they are in concerning spiritual things.