Because of what Paul has been writing to the Ephesians, he tells them how they should live their lives as believers and again emphasizes that believers are to agree with each other.
“as someone who is in prison because of his choice to serve the Lord”
Walking is a common way to express the idea of living one’s life. (See: rc://en/ta/man/translate/figs-metaphor)
“to learn to be humble, gentle, and patient”
“Bond of peace” here is a metaphor in which believers are viewed as being attached to one another by means of the strong influence of peace. AT: “seek to be attached to one another by means of peace to maintain the unity of the Spirit”