As Ephesians comes to a close, Paul brings us as Christians to the realization that in all of these things that he's spoken about we are in a spiritual battle.
Paul's command to be filled with the Spirit means to continually abide and to walk under the influence of the Spirit's power and authority.
To preserve the quality of our conversation, we're to fill our talk with thanksgiving. This raises the bar and keeps us from immoral conversation.
Paul's metric of church growth is Christ himself. We are to grow up into the fullness of Christ by walking with and wearing Christ. These are metaphors for repentance.