The goal of discipleship is to be like Jesus.
“I want to share with you where my mind has come to rest as I approach the end of my pilgrimage on earth, and it is: God wants His people to become like Christ. Christlikeness is the will of God for the people of God.”
–John Stott (from the last sermon he preached: “The Model: Becoming More Like Christ“)
For scriptures that reveal that the biblical goal of our growth is Christ-likeness see What does Christian maturity look like?.
What is Jesus Like? (pdf)
Richard Foster on the goal of the Christian life
Becoming Like Christ – Richard Foster
Claude King: The Goal of Discipleship
12 Characteristics Of A Godly Life – Roy L. Comstock
Barna Research: Are Christians More Like Jesus Or More Like The Pharisees? Lists some characteristics of Christ-likeness and measures how Christians compare.