"I don't think about the past. I focus on the present and the future."

Time travel is the most frustrating thing in the world. You can't change anything, and you can't stop anything from happening.

自动控制的艺术在于正确调整修正力。

你和我各有一个苹果，如果我们交换苹果的话，我们还是只有一个苹果。但当你和我各有一个想法，我们交换想法的话，我们就都有两个想法了。