"although we can in a way understand God without understanding his goodness, we cannot understand God by understanding that he is not good".

"licet nos intelligamus aliqualiter Deum, non intelligendo eius bonitatem, non tamen possumus intelligere Deum intelligendo eum non esse bonum".

St. Thomas Aquinas, De potentia 7.4.ad 8, trans. Ralph McInerny (Thomas Aquinas: selected writings, ed. & trans. Ralph McInerny (New York, NY: Penguin Books, 1998), 309).