8 And who is there that must not feel astonished and amazed at these things; and confidently pronounce that they are not the works of nature, but of that Providence which is above nature? Therefore one speaks thus: “Who hangs the earth upon nothing.” And another observes, “In His hands are the corners of the earth.” And again: “He has laid the foundation of it upon the seas.” And these declarations, though they seem contrary to one another, have yet an entire agreement.
For he that said, “He has laid the foundation of it upon the seas,” meant the same thing as he did who declared, “He has hung it upon nothing.” For its standing upon the waters is just the same thing as hanging upon nothing. Where then is it suspended and placed? Hear the same one saying, “In His hands are the corners of the earth.” Not that God has hands, but that you may know that His power it is, providing for all things which holds together and supports the body of the earth!
But if you believe not what I now say, believe what you behold, for even in another element it is possible to find this admirable workmanship. For it is the nature of fire to tend upwards, and to be always mounting aloft; and although you force and constrain it never so much, it cannot submit to have its course directed downwards. For often, when we are carrying a lighted torch, although we incline its head downwards, we cannot compel the force of the flame to direct itself to the ground; but still it turns upward, and passes from below toward that which is above.
But with respect to the sun, God has made it quite the contrary. For He has turned his beams toward the earth, and made his light to direct itself downward, all but saying to him by the very shape (of the heavens), “Look downward.— Shine upon men, for thou were made for them!” The light, indeed, of a candle cannot be made to submit to this; but this star, great and marvellous as it is, bends downward, and looks toward the earth, which is contrary to the nature of fire; owing to the power of Him who has commanded it.
Would you have me speak of another thing of the like kind? Waters embrace the back of the visible heaven on all parts; and yet they neither flow down, nor are moved out of their place, although the nature of water is not of this kind. For it easily runs together into what is concave; but when the body is of a convex form, it glides away on all sides; and not even a small portion is capable of standing upon such a figure. But, lo! This wonder is found to exist in the heavens; and the prophet, again, to intimate this very circumstance, observes, “Praise the Lord, you waters that are above the heavens.” Besides, the water has not quenched the sun; nor has the sun, which has gone on his way beneath for so long a time, dried up the water that lies above.
Source: Homilies on the Statues (New Advent)