Ephesians 4 is a call to live the life God has prepared for us --- that is to live a life "worthy of the calling" we have received. In this way, the body of Christ will be built up in unity of faith and mature in the knowledge of God and "attaining the whole measure of the fullness of Christ". As each part does its work, the whole body grows and builds up in love "into Him who is the Head, that is, Christ". We have been made new in the attitude of our minds and put on our new self, speaking the truth to our neighbors as members of one body. Paul says God gave a variety of gifts to us, some as teachers, some as evangelists, etc. to prepare us for works of service. Paul concludes by encouraging us to be kind and compassionate to one another, speaking only what is helpful for building others up according to their needs.