Final answer:
St. Augustine believed that sin was the absence of good.
Step-by-step explanation:
St. Augustine believed that sin was actually the absence of good. He viewed sin as a privation or lack of goodness, rather than a physical substance or an imitation of God. According to Augustine, God is the ultimate source of all goodness, and sin occurs when the divine goodness is absent or rejected.
Learn more about St. Augustine's view on sin