How do we know that true faith leads to joy?

True faith in Christ leads to joy because it is accompanied by a profound peace and assurance that can only come from a relationship with the Savior. In Philippians 3, the apostle Paul reflects on how everything that he once counted as gain he now considers loss for the sake of knowing Christ. This transformative understanding results in deep joy, as the believer realizes that their identity and security are found in Christ, not in their own efforts. Hence, genuine belief transforms a person's whole outlook on life, filling them with joy as they recognize God's love and grace towards them.