 Just as nothing that is not good comes from the Supreme Good, and every good is from the Supreme Good, likewise nothing that is not being [essentia] comes from the Supreme Being [essentia], and all being is from the Supreme Being. Since the Supreme Good is the Supreme Being, it follows that every being is a good thing and every good thing is a being. Therefore, just as nothing and non-being [non esse] are not being [essentia], likewise they are not good. So, nothing and non-being are not from He from whom nothing is unless it is good and being. (De Casu Diaboli, v.1, 235; translation by Sadler  [Other Internet Resources])