人的感情容易变化反复,人生之路常会崎岖不平。
Every material has its own memory and history.
Don't just fight in the North or the South. Always imagine every battle in your mind, where everyone is both your enemy and your friend, and all possible events happen simultaneously. That way, nothing will take you by surprise, and everything that happens will be something you've already imagined.
当时若不是去登高望远,后来怎知东海的浩瀚。