Considerations of the existence of God and of the immortality of the soul, with…

I will more particularly consider the curious fabric of the Eye and Hand. The Eye is a work of such incomparable Artifice, that who ever understands it, hath a sufficient proof of his Skill that formed it. This is most evident by dissecting it, and representing the parts separate one from another, and after reuniting them, and thereby discovering the Causes of the whole Composure, and of the Offices proper to every part.

I will more particularly consider the curious fabrick of the Eye and Hand. The Eye is a work of such incomparable Artifice, that who ever understands it, hath a sufficient proof of his Skill that form'd it. This is most evident by dissecting it, and representing the parts separate one from another, and after reuniting them, and thereby discovering the Causes of the whole Composure, and of the Offices proper to every part.

That that may be understood without seeing it, is that there is no member in the whole Body composed of more parts, nor more different, nor ordered with more exact wisdom between themselves in one frame. Their situation is so regular and necessary, that if any of them be never so little displaced, the Eye is no more an Eye. It includes three Humours that are transparent, and of different thickness, the one resembling Water, the other Glass, the other Chrystal, and from them borrow their names: to vary the place, the distance, the less or greater thickness, the figure that is peculiar to each of them would render the Eye altogether useless for seeing: for the refractions of the light that enters through the pupil would be disordered; and the rays not be ⟨p. 41⟩united in a point, to paint in the Retina, the images of visible objects, which is the last disposition from whence the act of seeing follows. Several tunicles involve it, one of which is perforated (as much as the little Circle in the middle that is called the pupil) to give open passage to the images flowing from their objects. The Muscles by their agency raise or cast down, turn or fix it. The Nerves fastened to the Brain, convey a supply of spirits for the sight, and transmit the representation of all visible objects without confusion to the internal senses.