The Boldness of God.
Peter goes from being the disciple who denies Jesus to become the boldest of all them.
What is the source of his courage? How can we aspire to that type of courage?
It requires radical monotheism, i.e. a radical commitment to God. Not an easy thing to do.
What are the drawbacks of this type of courage? We need humility to balance our boldness.
See Acts 4:5-12 and its interpretations of Christian exclusivity.