How do we know that trusting in Christ is essential for salvation?

In Christian theology, especially within the sovereign grace doctrine, salvation is fundamentally rooted in faith in Jesus Christ and His atoning work. The notion that being moral or religious does not equate to salvation is exemplified in Judas's life. Despite being one of the twelve disciples and partaking in ministry, Judas ultimately did not trust Christ for his righteousness. This highlights a crucial truth: salvation is through the grace of God and faith in Christ's finished work, as emphasized in Romans 3:22-24. Believers are urged to examine their hearts not for outward religious performances, but for genuine faith and trust in Christ as their only hope for salvation.