Kung-sun Ch'ao of Wei asked Tsze-kung, saying, 'From whom did Chung-ni get his learning?'
Tsze-kung replied, 'The doctrines of Wan and Wu have not yet fallen to the ground. They are to be found among men. Men of talents and virtue remember the greater principles of them, and others, not possessing such talents and virtue, remember the smaller. Thus, all possess the doctrines of Wan and Wu. Where could our Master go that he should not have an opportunity of learning them? And yet what necessity was there for his having a regular master?'