"That tiny piece of stone contains the entire Diamond Sutra, over 5200 characters in length. Chen Zhonsen is now 82 years old and lives in a remote part of China. During Cultural Revolution of the 60s and 70s he was imprisoned, and part of the time was in solitary confinement. During that time, he disciplined himself with Buddhist meditation and started carving characters so tiny they are not visible to the naked eye on small pieces of stone. 3/