"Education is the most powerful weapon which you can use to change the world."

到达顶峰的唯 一方法是攀登高山，而不是等待电梯。

在科学中，我们试图解释我们不理解的事物。在数学中，我们试图理解我们无法解释的事物。

So happiness is the most popular word we have heard through the past two years. Happiness is not only related to personal experiences and personal values, but also, it's about the environment.