Calvin Thielman (1930-2002) was pastor of the Montreat Presbyterian Church from 1962 to 1995 and a long-time research assistant to Billy Graham. He mentored many into faith and Christian ministry. His frequent call to commitment to Christ was to “give as much of yourself as you know how to give to as much of HIm as you understand.” For a description of Calvin Thielman’s preaching, see Old, Hughes Oliphant, The Reading and Preaching of the Scriptures in the Worship of the Christian Church, Volume 7: Our Own Time. Eerdmans Publishing, 2010.