David James Duncan said this quote

When Peter renounced the world he grew up in and the people he grew up with, I believe it was exactly as heroic as that of a person who, finding himself prone to violent seasickness, renounces yachting. Hell, Pete was hardly ‘in the world’ in the first place. That was just the problem. He knew more about 13th century Sufi Orders and the Ptolemaic Universe than the rivers and hills and sewers and mills in southwestern Washington.