How do we know that justification is through the faith of Christ?

In Galatians 2:16, it clearly states, 'Knowing that a man is not justified by the works of the law, but by the faith of Jesus Christ.' The distinction in wording is crucial; it emphasizes that our justification—being declared righteous before God—originates not from our own actions but entirely from the faith that Jesus Christ provides. This theological understanding asserts that Christ's work on the cross is the foundation of our righteousness, and our belief is a response to this divine gift. Thus, we can be confident that our standing before God is secured solely through His grace and faith.