The happiest people are those who have discovered that happiness is a choice and not a result of circumstances.
最幸福的人是那些发现幸福是一种选择而不是环境的结果的人。
经验是我们给错误取的另一个名字。
The most important skill in mathematics is the ability to ask the right questions.
If you want to make a bond, you are to take the risk of tearing.