Who is John Bunyan from Manual of the Warrior of Light and what is their importance?

John Bunyan was quoted by the Warrior in the book. John Bunyan said that he does not regret anything he has been through. Every scar he has is worthy of being on his body, and he has grown to where he can talk about his own tales of bravery should he wish to do so. But because he is a Warrior, he knows that he does not need to boast about his moments of bravery.