Personal Identity
At the start of Peter's second and last letter, he described himself as a servant and apostle of Jesus Christ. Once, he had been a disappointment to Jesus (Matthew 26:69-75). But, when restored, he had been 'sent out' (that is what 'apostle' means) by Jesus to preach the gospel (John 21:15-19). God worked through his ministry (Galatians 2:8), even though he still needed to learn (Galatians 2:11-13). Now, at the end of his life, he was still glad to be trusted as Christ's servant.