J. Oswald Sanders

"Try to explain exactly how prayer works and you will find quickly run against some very difficult puzzles.  But people who are skeptical of prayer's validity and power are usually those who do not practice it seriously or fail to obey when God reveals His will.  We cannot learn about prayer except by praying.  No philosophy has ever taught a soul to pray.  The intellectual problems associated with prayer are met in the joy of answered prayer and closer fellowship with God."