How do we know that God's grace causes good works?

Ephesians 2:8-10 emphasizes that salvation by grace through faith results in good works, not as a means to salvation but as evidence of it. True grace involves a heart transformation where the believer is zealous for good works, reflecting their new identity in Christ. This aligns with James 2:17, which states that faith without works is dead, affirming that authentic faith naturally produces good works as the Holy Spirit works within believers. Therefore, the fruit of good works is a sign of God's transforming grace at work in a believer's life.