We see that He who made the eyes made everything else, that He who found the secret of transmitting instantaneously in all directions in a straight line the rays produced or reflected by luminous or illuminated objects, rays, I say, of different kinds, and yet that constantly intersect and never confuse each other, intended to form the eyes so that by means of these rays He could, by acting in a uniform manner in us as in everything surrounding us, join us to His other works and make us admire their order, beauty, and grandeur.