Peter denies Christ three times. Jesus says whoever denies Me before men, him I will also deny before the Father. Then the Lord asked me, what about Peter?’ He had denied Me before men.
The answer is Holy Spirit. The man who was a coward to confess his faith to a damsel, of a dying Christ, was preaching to three thousand of the resurrected Christ.
Holy Spirit begins a new chapter or rather a new book with a new story. He is indescribable. Where we see broken bones like Ezekial’s vision of the valley, Holy Spirit sees armies ready to fight battles.