As the innermost Essence of God is self-existence, so the cosmos (by which we mean everything not-God) is essentially dependent on God as its first and sole cause. The universe is no ens a se; it is entirely ab alio. This dependency is co-existent with the universe in all its phases. From the moment of its creation down to the hour of its consummation the universe is and remains essentially ens ab alio. It depends on God for its being and operation, and would sink back into nothingness without Him.
JOSEPH POHLE, God: The Author of Nature and the Supernatural