You will realize that doctrines are inventions of the human mind, as it tries to penetrate the mystery of God. You will realize that Scripture itself is the work of human minds, recording the example and teaching of Jesus. Thus it is not what you believe that matters; it is how you respond with your heart and your actions. It is not believing in Christ that matters; it is becoming like him.
Attributed to Pelagius
Imagine how much time, argument and bad feeling we'd have saved over the centuries if the advice of this "heretic" had become the foundation of the church.