How do we know that faith in Christ is necessary for salvation?

The necessity of faith in Christ for salvation is vividly portrayed throughout the New Testament. Ephesians 2:8-9 clearly articulates that we are saved by grace through faith, underscoring that this salvation is not of our own doing but a gift from God. Furthermore, Romans 3:22 explains that the righteousness of God is revealed through faith in Jesus Christ for all who believe. This reinforces the idea that trust in Christ's atoning work is the only means by which we can be justified before God, thus affirming faith's critical role in the salvation process.