Gregory the Dialogist

Though I were perfect, even this my soul shall not know. Most commonly if we know the good things that we do, we are led to entertain pride; if we are ignorant of them, we cannot keep them. For who would not, in however slight degree, be rendered proud by the consciousness of his virtue? or who, again, would keep safe within him that good, which he does not know of? …

Morals on the Book of Job, Book IX ↗

Thomas Aquinas

The third degree is when someone, although he might be interiorly conscious of sin, still takes for granted either he had no evil intention or he did not do it from malice and deceit, but from ignorance and weakness. But this testimony also does not stand for man against God either. …

Commentary on Job ↗