4. But I also, as yet, although I said and was firmly persuaded, that Thou our Lord, the true God, who madest not only our souls but our bodies, and not our souls and bodies alone, but all creatures and all things, wert uncontaminable and inconvertible, and in no part mutable: yet understood I not readily and clearly what was the cause of evil. And yet, whatever it was, I perceived that it must be so sought out as not to constrain me by it to believe that the immutable God was mutable, lest I myself should become the thing that I was seeking out. I sought, therefore, for it free from care, certain of the untruthfulness of what these asserted, whom I shunned with my whole heart; for I perceived that through seeking after the origin of evil, they were filled with malice, in that they liked better to think that Thy Substance did suffer evil than that their own did commit it.