How do we know that justification comes through faith and not works?

The assurance that justification comes by faith rather than works is grounded in the teachings of Scripture. Romans 3:22 states, "Even the righteousness of God which is by faith of Jesus Christ unto all and upon all them that believe." This underscores that it is through Christ's faithfulness, not human works, that people are declared righteous. Additionally, Ephesians 2:8-9 reinforces that salvation is not of works, lest any man should boast. The essence of the Gospel is that our righteousness is found solely in Christ's obedience and sacrifice.