痛苦是一种语言，只有经历过的人才能理解。
Pain is a language that only those who have experienced it can understand.
On ne peut trop tôt souffrir ce qu'on ne saurait éviter.
No man should judge unless he asks himself in absolute honesty whether in a similar situation he might not have done the same.
晏子春秋
"If you don't stand for something, you'll fall for anything."
The beauty of mathematics only shows itself to more patient followers.