How do we know that God's plan of salvation is true?

The assurance of God's plan of salvation rests firmly upon Scripture, particularly in Ephesians 1:4-5, which states that God chose us in Christ before the foundation of the world. The unfolding of God's redemptive history throughout the Bible, culminating in the life, death, and resurrection of Jesus Christ, demonstrates that God's purposes are sovereign and unchangeable. Revelation 5 shows Christ as the only one worthy to execute God's plan, affirming that all comes to fruition according to His divine decrees. Moreover, Romans 8:28 affirms that all things work together for the good of those who are called according to His purpose, further solidifying the truth of redemption.