Paul is emphasizing the importance of consistency in teaching and living out the Christian faith. By sending Timothy, whom he calls his beloved son, Paul is entrusting him with the responsibility of reminding the Corinthians of Paul's own way of life and teachings in Christ. This reflects the close relationship between Paul and Timothy, as well as Timothy's faithfulness and reliability in the Lord. Paul's teachings are not just words but are embodied in his lifestyle, and he wants the Corinthians to see this model through Timothy.
Timothy's mission is to ensure that the Corinthians understand and adhere to the teachings that Paul has consistently shared across all churches. This underscores the universal nature of Paul's message and the importance of maintaining a unified doctrine within the Christian community. It also highlights the role of mentorship and discipleship, as Timothy is tasked with guiding the Corinthians in Paul's absence. This passage encourages believers to live out their faith consistently and to value the guidance of trusted spiritual leaders.