世界上充满了神奇的事物，耐心地等待着我们的智慧变得更加敏锐。
The world is full of magical things patiently waiting for our wits to grow sharper.
You are never too old to set another goal or to dream a new dream.
The joy of solving a mathematical problem is unparalleled; it is a moment of pure intellectual triumph.
The best way to reduce costs is to not have them in the first place.
我们都是自己犹豫的总和。