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

The assurance of salvation through faith alone rests on the completed work of Jesus Christ, who provides rest for the weary and weary sinners in need of rescue from sin and judgment. Hebrews 4:9 speaks of a 'rest' that remains for the people of God, emphasizing the belief that the righteous enter this rest through faith in Christ’s atoning sacrifice. The assurance of salvation is rooted in the belief that His work on the cross fully satisfied the requirements for righteousness. Therefore, it's not by human effort or decision that one is saved, but by God's sovereign work in drawing sinners to Himself and granting them faith to believe.