It takes a great deal of bravery to stand up to your enemies, but a great deal more to stand up to your friends.

It takes a great deal of bravery to stand up to your enemies, but a great deal more to stand up to your friends.

在敌人面前，你需要很大的勇气，但在朋友面前，你需要更大的勇气。

-- J. K. Rowling J.K.罗琳