Paul was a student of his heart. He paid attention to the desires and impulses that churned within. I don't think it's a stretch to say that he knew he was capable--given the right circumstances--of the worst of sins and vilest of motives.
Paul was a realist. He wanted to see God and himself truly. No hiding behind a facade of pleasantness or religiosity for him. When we take a look within, let's be realistic. What's lurking in the crevices of our shady heart? Be a realist.
