In computer science, we often deal with problems that are easy to state but hard to solve.

"Every saint has a past, and every sinner has a future."

For beautiful eyes, look for the good in others; for beautiful lips, speak only words of kindness; and for poise, walk with the knowledge that you are never alone.

Quality is not an act, it is a habit.

天下的治乱不在于一个王朝的兴亡，而在于百姓的忧乐

The act of writing is an act of resistance.