Ephesians 3:21 serves as a doxology, a form of praise that acknowledges the greatness and eternal nature of God's glory. This glory is expressed both in the church and through Christ Jesus, emphasizing the integral role of the church as a community of believers who reflect God's presence in the world. The mention of 'all generations' underscores the timelessness of God's glory, suggesting that it is not confined to any one era or group but is a perpetual truth that spans across the ages.
The church, as the body of Christ, is called to be a living testament to God's glory, demonstrating His love, grace, and power through its actions and faith. In Christ Jesus, God's glory is fully revealed, as He embodies the divine nature and mission of God. The phrase 'for ever and ever' reinforces the idea of God's unending reign and the perpetual nature of His glory. Ending with 'Amen' signifies agreement and affirmation, inviting believers to join in this declaration of praise, acknowledging the eternal and unchanging glory of God.