If you don't go through the tough times, you don't get to the good times.
如果你不经历艰难时刻,你就无法到达美好的时光。
快乐的最好方法是爱自己。
Death is present every day, but we don't see it until it touches us directly.
Every mathematical problem is a puzzle waiting to be solved, and every solution is a step towards greater understanding.