How do we know the doctrines of Christianity are true?

The doctrines of Christianity are validated by the consistent and powerful testimony of Scripture. Rather than presenting a systematic theology, Scripture reveals truths in response to specific situations faced by the early believers. This providential guidance by God not only addresses the immediate concerns of the apostles’ audiences but also equips all generations with sufficient evidence to believe and practice the faith.

The ongoing relevance and challenge posed by opposing ideologies, such as those from Socinians or Arminians, further highlight the strength of Paul's teachings. By illustrating the doctrine of justification through faith, especially in the context of Jewish law, the Apostle Paul provides clarity and depth to our understanding of salvation. Scholarship, historical context, and the work of the Holy Spirit in the lives of believers underscore the truthfulness and transformative power of these doctrines.