子曰：“学而时习之，不亦说乎？”Confucius Said,"Is it not pleasant to learn with a constant perseverance and application?"子曰く、学びて時にこれを習う、亦説ばしからずや。
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。”Confucius said, "At fifteen, I had my mind bent on learning.At thirty, I stood firm.
子曰：“学而不思则罔，思而不学则殆。”Confucius Said，"Learning without thought is labor lost; thought without learning is perilous.
