瑕不掩瑜、瑜不掩瑕。
【释义】玉的瑕疵掩盖不了它的光泽，玉的光泽也掩盖不了它的瑕疵。
I think prime numbers are like life. They are very logical but you could never work out the rules, even if you spent all your time thinking about them.
No moral system can rest solely on authority.
The true discovery of America is before us. The true fulfillment of our spirit, of our people, of our mighty and immortal land, is yet to come.