Though he avoided outright endorsement of the view, fifth-century Church Father Saint Augustine was clearly familiar with the theory of the spherical earth: "They [those who believe that "there are men on the other side of the earth"] fail to observe that even if the world is held to be global or rounded in shape, or if some process of reasoning should prove this to be the case, it would still not necessarily follow that the land on the opposite side is not covered by masses of water."
Saint AugustineFor great are you, Lord, and you look kindly on what is humble, but the lofty-minded you regard from afar. Only to those whose hearts are crushed do you draw close. You will not let yourself be found by the proud, nor even by those who in their inquisitive skill count stars or grains of sand, or measure the expanses of heaven, or trace the paths of the planets.
Saint AugustineThat there should be some fire even after this life is not incredible, and it can be inquired into and either be discovered or left hidden whether some of the faithful may be saved, some more slowly and some more quickly in the greater or lesser degree in which they loved the good things that perish, through a certain purgatorial fire.
Saint Augustine