How do we know the doctrine of salvation through Christ is true?

The doctrine of salvation through Christ is firmly rooted in Scripture, serving as the divine revelation of God's plan for humanity. Colossians 1:20, for instance, states that peace is made through the blood of His cross, emphasizing the core tenet that Jesus's sacrificial death is the means by which we can be reconciled to God. Additionally, Paul’s assertion in Galatians 2:20, 'I am crucified with Christ: nevertheless I live; yet not I, but Christ liveth in me,' confirms the transformative nature of salvation that is realized through personal faith in Christ. Furthermore, the evidence of Christ's resurrection reinforces the truth of salvation, as it demonstrates His victory over sin and death, assuring believers of their eternal life through faith in Him (1 Corinthians 15:55-57). Thus, the reliability of this doctrine lies in its scriptural foundation and its profound implications for the believer’s life.