Offhand, I'd say he's stupid. 要我不假思索而言, 我会说他并不聪明. You're a reject. 你是个淘汰品.
That's kind of corny. 那很可笑. You should broaden your horizons. 你实在应该出去开开眼界.
A little knowledge is a dangerous thing. 一知半解很危险. Knowledge is power. 知识就是力量.
Ignorance is bliss. 无知便是福.
