means,

Having a meek and humble spirit towards one another; each one putting the other first; each one putting the other above himself; each yielding to one another instead of demanding his or her own way.

And be not drunk with wine, wherein is excess; but be filled with the Spirit; Speaking to yourselves in psalms and hymns and spiritual songs, singing and making melody in your heart to the Lord; Giving thanks always for all things unto God and the Father in the name of our Lord Jesus Christ; Submitting yourselves one to another in the fear of God.
Ephesians 5:18-21