Thus, by this example, you can understand that if the eye is above a

number of objects all placed on the same level, one beyond another,

the more remote they are the higher they will seem, up to the level of

the eye, but no higher; because objects placed upon the level on which

your feet stand, so long as it is flat--even if it be extended into

infinity--would never be seen above the eye; since the eye has in

itself the point towards which all the cones tend and converge which

convey the images of the objects to the eye. And this point always

coincides with the point of diminution which is the extreme of all

we can see. And from the base line of the first pyramid as far as