Tim Keller's Practical Prayer Advice The bestselling author calls prayer "the key to everything we need to do and be in life." Read More CultureJonathanNovember 3, 2014Augustine, Calvinism, Christianity, evangelicalism, God, Holy Spirit, J-I- Packer, Jesus, John Calvin, John Owen, Jonah, Jonathan Edwards, Jonathan Merritt, Martin Luther, prayer, Spirituality, theology, Tim Keller, Timothy Keller