We are all insane. That is what original sin means. Sin is insanity. It is preferring finite joy to infinite joy, creatures to the Creator, an unhappy, Godless self to a happy, God-filled self Only God can save us from this disease. That is what the name "Jesus" means: 'God saves'.
Peter KreeftGod created the possibility of evil; people actualized that potentiality. The source of evil is not God's power but mankind's freedom. Even an all-powerful God could not have created a world in which people had genuine freedom and yet there was no potentiality for sin, because our freedom includes the possibility of sin within its own meaning.
Peter KreeftSocrates: So even our walks are dangerous here. But you seem to have avoided the most dangerous thing of all. Bertha: What's that? Socrates: Philosophy. Bertha: Oh, we have philosophers here. Socrates: Where are they? Bertha: In the philosophy department. Socrates: Philosophy is not department. Bertha: Well, we have philosophers. Socrates: Are they dangerous? Bertha: Of course not. Socrates: Then they are not true philosophers.
Peter Kreeft