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[Han2 Yu4])
trad. 人非生而知之者，孰能無惑
Also written人非生而知之者，孰能無惑【rén fēi shēng ér zhī zhī zhě , shú néng wú huò】
to grow; to give birth; to produce; to be born, to arise; to occur, to light (a fire), to live; to be alive, life, raw; uncooked; unprocessed, unfamiliar; strange, (bound form) student; person engaged in a field, (bound form) male role in traditional opera, (bound form) life; lifetime, (bound form) means of livelihood, (bound form) very; intensely (as in 生疼[sheng1 teng2]), (bound form) in a forced manner (as in 生拉硬拽[sheng1 la1 ying4 zhuai4])
(after a verb or adjective) one who (is) ..., (after a noun) person involved in ..., -er, -ist, (used after a number or 後|后[hou4] or 前[qian2] to refer to sth mentioned previously), (used after a term, to mark a pause before defining the term), (old) (used at the end of a command), (old) this