It is By Grace

When we want to emphasize something, we often repeat it. Paul repeats a phrase in his letter to Christ's followers in Ephesus to remind them that no one is better than anyone else; all of us were at one time spiritually "dead" because of our sin and headed for physical death in them -but God resurrected us through Christ:

"But because of his great love for us, God, who is rich in mercy, made us alive with Christ even when we were dead in transgressions—it is by grace you have been saved. And God raised us up with Christ and seated us with him in the heavenly realms in Christ Jesus, in order that in the coming ages he might show the incomparable riches of his grace, expressed in his kindness to us in Christ Jesus. For it is by grace you have been saved, through faith—and this not from yourselves, it is the gift of God— not by works, so that no one can boast. For we are God's workmanship, created in Christ Jesus to do good works, which God prepared in advance for us to do."

For that grace - the salvation it brings (being seated in the heavenly realms) and the purpose in life that comes with it (doing good works) - we should be filled with gratitude and worship with every word and act in our lives.