How do we know that God establishes us in every good work?

The establishment in every good work is a direct result of God's grace at work in believers' lives. Hebrews 13:9 speaks of how it is good for our hearts to be established with grace, contrasting it with a reliance on religious observances or dietary laws, which do not profit spiritually. This grace comes from the understanding and acceptance of the gospel that centers on Jesus Christ. As we grow in our faith and knowledge of Him, we become equipped to do good works that honor Him, fulfilling the purpose for which we are created as His people. Therefore, our assurance lies in the faithfulness of God who enables us to stand firm.