Psalms 148:6

3. For as the heaven which is above us, the firmament, the sun, the moon, the rest of the stars, and all their grandeur, although they had no previous existence, were called into being, and continue throughout a long course of time according to the will of God, so also any one who thinks thus respecting souls and spirits, and, in fact, respecting all created things, will not by any means go far astray, inasmuch as all things that have been made had a beginning when they were formed, but endure as long as God wills that they should have an existence and continuance. …

19. And to Thee is there nothing at all evil, and not only to Thee, but to Thy whole creation; because there is nothing without which can break in, and mar that order which Thou hast appointed it. But in the parts thereof, some things, because they harmonize not with others, are considered evil; whereas those very things harmonize with others, and are good, and in themselves are good. And all these things which do not harmonize together harmonize with the inferior part which we call earth, having its own cloudy and windy sky concordant to it. …

19. What, therefore, will ye say, ye objectors? Are these things false? “No,” they say. “What is this? Is it false, then, that every nature already formed, or matter formable, is only from Him who is supremely good, because He is supreme? . . . . Neither do we deny this,” say they. “What then? Do you deny this, that there is a certain sublime creature, clinging with so chaste a love with the true and truly eternal God, that although it be not co-eternal with Him, yet it separateth itself not from Him, nor floweth into any variety and vicissitude of times, but resteth in the truest contemplation of Him only?” Since Thou, O God, showest Thyself unto him, and sufficest him, who loveth Thee as much as Thou commandest, and, therefore, he declineth not from Thee, nor toward himself. …

6. “He hath established them for the age, and for age upon age” ( ver. 6 ). All things in heaven, all things above, all powers and angels, a certain city on high, good, holy, blessed; from whence because we are wanderers, we are wretched; whither because we are to return, we are blessed in hope; whither when we shall have returned, we shall be blessed indeed; “He hath given them a law which shall not pass away.” What sort of command, think ye, have things in heaven and the holy angels received? What sort of command hath God given them? What, but that they praise Him? Blessed are they whose business is to praise God! They plough not, they sow not, they grind not, they cook not; for these are works of necessity, and there is no necessity there. They steal not, they plunder not, they commit no adultery; for these are works of iniquity, and there is no iniquity there. …

Others have pictured the heaven as a hemisphere. This idea is suggested by these words of David, the singer of God, Who stretchest out the heavens like a curtain , by which word he clearly means a tent: and by these from the blessed Isaiah, Who hath established the heavens like a vault : and also because when the sun, moon, and stars set they make a circuit round the earth from west to north, and so reach once more the east. Still, whether it is this way or that, all things have been made and established by the divine command, and have the divine will and counsel for a foundation that cannot be moved. For He Himself spoke and they were made: He Himself commanded and they were created. He hath also established them for ever and ever: He hath made a decree which will not pass .