My theological book study group recently read You Are What You Love by James K. A. Smith. He makes this important point:
“Worship is the arena in which God recalibrates our hearts, reforms our desires, and rehabituates our loves. Worship isn’t just something we do; it is where God does something to us. Worship is the heart of discipleship because it is the gymnasium in which God retrains our hearts.” 
One of the ways worship is a gymnasium in which God retrains our heart is through repetition. Just as repetition is important in learning to play an instrument or mastering a sport, so repetition is important in shaping us as faithful disciples of Jesus Christ.
 James K. A. Smith,You Are What You Love: The Spiritual Power of Habit (Grand Rapids, Michigan: Baker Publishing Group, 2016), 77, Kindle.