In all affairs it's a healthy thing now and then to hang a question mark on the things you have long taken for granted.

In all affairs it's a healthy thing now and then to hang a question mark on the things you have long taken for granted.

在所有的事情中，不时地对你长期以来认为理所当然的事情打上一个问号是一件有益的事情。

-- Bertrand Russell 罗素