最伟大的老师是那些告诉你去哪里看，但不告诉你该看到什么的人。
The greatest teachers are those who tell you where to look but don’t tell you what to see.
The essence of mathematics lies in its freedom.
The truth is always an insult or a joke.
Stay true to yourself, don't change because of others' opinions.
Every challenge is an opportunity to learn and grow.
人的教育应该从出生开始，一直持续到死亡。
