How do we know that salvation is through faith in Jesus Christ?

Salvation through faith in Jesus Christ is foundational to Reformed theology, as articulated in Romans 10:9-10, which states that if one confesses with their mouth that Jesus is Lord and believes in their heart that God raised Him from the dead, they will be saved. This connection between belief, confession, and salvation highlights that it's not our works, but our faith in Christ that secures our justification before God.

Furthermore, Ephesians 2:8-9 clearly states, 'For by grace you have been saved through faith, and that not of yourselves; it is the gift of God, not of works, lest anyone should boast.' The nature of salvation as a divine gift emphasizes the sovereignty of God in choosing and saving individuals, aligning with the teachings of sovereign grace. This understanding safeguards believers from relying on their efforts, reinforcing the truth that salvation is purely by grace through faith in Jesus Christ.