"O marvellous, O stupendous necessity, thou with supreme reason compellest all effects to be the direct result of their causes; and by a supreme and irrevocable law every natural action obeys thee by the shortest possible process. Who would believe that so small a space could contain the images of all the universe? O mighty process! What talent can avail to penetrate a nature such as these? What tongue will it be that can unfold so great a wonder? Verily none! This it is that guides the human discourse to the considering of divine things. Here the forms, here the colours, here all the images of every part of the universe are contracted to a point. What point is so marvellous? O wonderful, O stupendous necessity - by thy law thou constrainest every effect to be the direct result of its cause by the shortest path. These are miracles . . . forms already lost, mingled together in so small a space it can recreate and recompose by expansion. Describe in thy anatomy what proportion there is between the diameters of all the lenses (spetie) in the eye and the distance from these to the crystalline lens."