He has just left the university, does not deem himself overwise, but believes he knows more than other people.

他刚离开大学， 并不认为自己聪明， 但相信自己比别人懂得多。

Do not be overrighteous, neither be overwise— why destroy yourself?

不要行义过分，也不要过于自逞智慧，何必自取败亡呢？

" Why? I've a mind he'd be overwise and mysterious for you in the end" .

“为什么？我猜到最后他对你来说会过于机智和神秘” 。