子曰：“吾十有五而志于学，三十而立，四十而不惑，五十而知天命，六十而耳顺，七十而从心所欲，不逾矩。”
【译文】 孔子说：“我十五岁立志于学习，三十岁有所建树，四十岁不困惑，五十理解自然规律，六十明辨是非，七十随心所欲，不违规。”
The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.
Before I came here I was confused about this subject. Having listened to your lecture I am still confused. But on a higher level.
I don't want to be sexy, I want to be iconic.