Richard Foster is a prominent Christian author, theologian, and spiritual formation leader, best known for his influential book Celebration of Discipline (1978). Born in 1949, Foster is a member of the Religious Society of Friends (Quakers), and his writings reflect a deep emphasis on simplicity, prayer, and spiritual growth. He served as a pastor and later founded Renovaré, a nonprofit organization focused on Christian spiritual renewal. Through his work, Foster has been instrumental in reviving interest in classic spiritual disciplines such as fasting, meditation, solitude, and service. His books, including Prayer: Finding the Heart’s True Home and Streams of Living Water, have guided millions in deepening their faith across denominational lines.