Every body that moves rapidly seems to colour its path with the impression of its hue. The truth of this proposition is seen from experi-ence; thus when the lightning moves among dark clouds the speedofits sinuous flight makes its whole course resemble a luminous snake.So in like manner if you wave a lighted brand its whole course will seem a ring of flame. This is because the organ of perception acts more rapidly than the judgment.
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If you look at a luminous body in the far distance through a smallhole it will seem to grow less, and if you look at it near at hand it will not undergo any change. That is that if you look at this light atadistance of one or two braccia from the aforesaid hole it will not undergo any change whether you are looking at it through this hole or outside of it.
Here forms, here colours, here the character of every part of the universe are concentrated to a point; and that point is so marvellous a thing ... Oh! marvellous, O stupendous Necessity - by thy laws thou dost compel every effect to be the direct result of its cause, by the shortest path. These are miracles.
All bodies together, and each by itself, give off to the surrounding air an infinite number of images which are all-pervading and each complete, each conveying the nature, colour and form of the body which produces it.
No small hole can so modify the convergence of rays of light as to prevent, at a long distance, the transmission of the true form of the luminous body causing them.
The eye encompasses the beauty of the whole world.
All objects transmit their image to the eye in pyramids and the nearer to the eye these pyramids are intersected the smaller will the image appear of the objects which cause them.
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