John Bunyan (1628-1688) was one of the most influential authors of the seventeenth century. He was jailed for a dozen years for “teaching men to worship God contrary to the law,” during which time he wrote The Pilgrim’s Progress, which has been continuously in print for more than 300 years. Bunyan was a great lover of the teachings of Martin Luther. His conversion experience is found in Grace Abounding to the Chief of Sinners.