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

Salvation is firmly rooted in the belief that it is by grace alone, through faith alone, in Christ alone. Acts 4:12 asserts that salvation is found in no one else, for there is no other name under heaven given to mankind by which we must be saved. This underscores the necessity of faith in Christ as the sole way to attain salvation. The sacrificial death of Jesus on the cross serves as the foundation for this faith, demonstrating God's love and justice. Moreover, Ephesians 2:8-9 emphasizes that it is by grace we are saved through faith, not by works, ensuring that no one can boast about their own merits concerning salvation. Thus, faith in Christ alone is a cornerstone of Reformed theology.