Competitive strategy is about being different. It means deliberately choosing a different set of activities to deliver a unique mix of value.
置身于是非之外，评断是非才能客观；置身于利害之外，才能看清利害的变化。
"A book is a conversation with the dead."
记忆是我们无法被驱逐的唯一天堂。
Mathematics is the language in which the gods talk to people.