The world’s definition of unity and the practice of it is very different from that of the Bible. Christian unity is very radical, in that, it transcends beyond cultural and economical boundaries. In this passage of Ephesians, Paul directs our thoughts on why pursuing unity matters for believers and how to practice it.
In the Bible, God sets aside His redeemed people primarily to fellowship with Him and to glory Him by reflecting His character through His people in this world. God is glorified when His redeemed people show certain marks that remind the world about God and His kingdom. In this passage, we learn how sincere love for others and constantly fighting sin in our lives through repentance and overcoming temptation, are the ongoing marks of a true Christian.