How has prayer strengthened your faith? 
  
Prayer is a wartime walkie-talkie, not an intercom to the butler. In fact, you will not know what prayer is really for until you know that life is war. When we pray, we are equipped with strength and power to do hard things for the kingdom of God. 
 
Watch “Prayer, Evangelism, Screens, and God: A Conversation with John Piper.”