[159] On which account men, using the most excellent of all gifts, contemplate the things which exist in the world, the earth, the plants, the animals, the fruits of the earth, the seas, the effusion of waters springing from the earth and gushing forth in torrents and floods, and the varieties of fountains, some of which give forth cold and others hot water, and the natures of all things that exist in the air; and all the different species, of which we thus arrive at the knowledge, are innumerable and indescribable, and cannot be comprised in speech. And above all these things, the eyes can behold the heaven, which is truly a world created in another world, and it can also survey the beauties and divine images existing in heaven. Which now of the other external senses can boast that it has arrived at such a pitch of power as this?