How do we know God is the justifier of believers?

The certainty that God is the justifier stems from Romans 3:26, which states that God might be just and the justifier of the one who has faith in Jesus. This reinforces the idea that faith is not only about belief but about trust in God's redemptive work in Christ. In believing, we acknowledge our sins and our inability to earn salvation, thus leaning entirely on God’s grace and Christ’s sacrifice. This act of faith aligns us with God's righteousness and secures our status before Him as justified believers.