How man fell into sin without that implicating a sovereign God in evil is, to Calvin, ". . . a secret so much excelling the insight of the human mind that I am not ashamed to confess ignorance. Far be it from any of the faithful to be ashamed of ignorance of what the Lord withdraws into the glory of his inaccessible light."
John Calvin, Concerning the Eternal Predestination of God, page 124.