yú é
balance (of an account, bill etc)
surplus
remainder
rén fēi shēng ér zhī zhī zhě , shú néng wú huò
Knowledge is not innate to man, how can we overcome doubt?
We are not born with knowledge, how does one achieve maturity? (i.e. without guidance from a teacher - Tang dynasty essayist Han Yu 韓愈|韩愈)
Wǔ Shèng
the Saint of War (i.e. the deified Guan Yu 關羽|关羽[Guan1 Yu3])