The moral feeling of human nature is an obligation， and we must endow the soul with the sense of beauty.
人性中的道德感是一种义务，而我们则必须赋予灵魂以美感。
To love is to give without expecting anything in return.
The use of a program to prove the 4-color theorem will not change mathematics - it merely demonstrates that the theorem, a challenge for a century, is a finite problem.
"The greatest gift you can give someone is your time and attention."