For as, when a person leaves off speaking, his voice ceases to be, and vanishes; so if the Heavenly Father should cease to speak His Word, the effect of that Word, i. e. the universe which is created in the Word, shall cease to exist.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Hom. 2 in div. loc.