改变是好的。改变就是进步。没有改变，一切都不会改善。

无限的责任是一种病态。

"We're going on a bear hunt. We're going to catch a big one. What a beautiful day! We're not scared."

勇气是知道什么不该畏惧。

Education is an admirable thing. But it is well to remember from time to time that nothing that is worth knowing can be taught.