In this regard, being an apprentice of Jesus (someone being with Jesus, learning to be like him), involves learning about activities that might help one grow in the fruit of the spirit, namely love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, and self-control (Galatians 5:22-23). Such activities might include spiritual exercises practiced throughout the ages such as prayer, fellowship, Service, study, simplicity, chastity, solitude, and fasting. Willard explains the crucial role of engaging in spiritual exercises in his book The Spirit of the Disciplines: Understanding How God Changes Lives—a book that was written after In Search of Guidance: Developing a Conversational Relationship with God.