Quis Rerum Divinarum Heres Sit

From the spring equinox to the summer solstice, day receives an addition to its length, and night, on the other hand, submits to a diminution; until the longest day and the shortest night are both completed. And then after the summer solstice the sun, turning back again the same road, neither more quickly nor more slowly than he advanced, but always preserving the same difference in the same manner, having a constantly equal arrangement, proceeds on till the autumnal equinox; and then, having made day and night both equal, it begins to increase the length of

And when it has made the night the longest night, and the day the shortest day, then returning back again and adopting the same distances as before, he again comes to the spring equinox. Thus the differences of time which appear to be unequal, do in reality possess a perfect equality in respect of magnitude, not indeed at the same seasons, but at different seasons of the year.

And a very similar effect is seen in the different parts of animals and especially of men. For hand is equal to hand, and foot to foot, and nearly all the other limbs of the body are equal to their corresponding members in magnitude, those on the left hand being equal to those on the right. And there are an exceeding number of things which are equal to one another in power, both among wet things and dry things, the judgment on which is seen in measures and scales, and things of that kind.

And nearly all things are equal as respects proportion, even all the little and all the great things in the whole world. For those who have examined the questions of natural philosophy with some accuracy say that the four elements are all equal in proportionate equality. And it is by proportion that the whole world is compounded together, and united, and endowed with consistency so as to remain firm for ever, proportion having distributed equality to each of its parts.