How do we know the authority of the apostles is true?

The apostolic authority is rooted in the specific commissioning by Jesus Christ, who appointed the apostles as His witnesses to spread the Gospel. Paul, in 1 Corinthians, makes appeals to this authority, asserting that his judgments, like the disciplinary action recommended, are not of mere human origin but come with divine authority. This authority was evident through their teachings, which are foundational to the church, and their accompanying signs, miracles, and spiritual gifts that validated their message. Ultimately, it is through the inspired Word of God that we understand the permanence and legitimacy of apostolic authority, as they uniquely contributed to the foundation of Christian doctrine.