After four chapters of telling us what Christ has done for us and urging us to have faith in him alone in order to be right before God, Paul turned in Galatians 5:1-15 to explain the main thing that faith produces in our lives, which is love. While we are saved by faith alone, faith is itself never alone in the lives of believers but always accompanied by love.
Because of the Holy Spirit, believers can live in a way that pleases God.
Christians need to learn to speak with joy, listen with discernment, and grow in grace.
In Stephen's speech before the Jewish Council, he gave a master class on the meaning of Old Testament history, which culminated in Jesus.