How do we know the doctrine of reprobation is true?

The truth of the doctrine of reprobation is upheld in canonical Scripture, particularly within the teachings of Paul in Romans 9 and 2 Timothy 2:19-20. In Romans, Paul explains that God has the right to choose whom He shows mercy to and whom He hardens. This principle supports the Reformed understanding of divine sovereignty over human choices. Historical church confessions, such as the Canons of Dordrecht, also affirm this doctrine, emphasizing that God's election is unconditional and that reprobation follows as a necessary aspect of His justice and glory. By studying these scriptural foundations and theological affirmations, believers can confidently affirm the truth of reprobation.