How do we know apostolic traditions are true?

The truth of apostolic traditions comes from their foundation in the Word of God, delivered by the apostles themselves under divine authority. Paul asserts in Galatians 1:11 that his gospel is not of human origin but revealed by God. This assurance of truth is further supported by the fact that the apostles' teachings were delivered both in person and through their writings, forming the basis of what the early church believed and practiced. Thus, any tradition must be measured against Scripture to ensure its authenticity.