Beyond all else Billy Graham studies the Bible, the supreme authority for his belief and action. Every day he reads five Psalms, covering the psalter in a month, and one chapter of Proverbs, the book that “shows us how to relate our own lives to our fellow men.” He reads through a Gospel each week, using commentaries and modern translations, and constantly returns to the Acts of the Apostles. He annotates throughout the Bible. “Sometimes His word makes such an impact on me that I have to put the Bible down and walk around for a few moments to catch my breath.” He learns great stretches by heart.
From the book "The Billy Graham Story: The Authorized Biography: Revised and Updated Edition of To All the Nations"