Our faculty of obedience is broken and cannot be fixed. We bite the hand that feeds us. To rescue us from godlessness and return us to our home in paradise, God bypasses it. Instead, God uses our faculty of rationality which works.
Calvary was God's attempt to persuade us that their love for us is indestructible. At Calvary, the Son of God let go of His body. He let go of his blood. He let go of his very life itself. But he refused to yield to us His love for us. It was too precious to Him to let us take it. Calvary is powerful proof indeed of indestructible love!