What are the classic backstabbing sentences?

The classic sentences of stabbing in the back are:

1. I'm not afraid of being stabbed in the back. I'm afraid that when I look back, I'll see that the man who stabbed me in the back is the one I treated with my heart. I'm not afraid to tell my best friend the truth. I'm afraid he will tell it as a joke in the future.

2. A friend is like a knife. You never know when someone will stab you in the back.

Betraying someone you trust most is like choking on your own blood, which you never thought would happen.

In this world, we can't tell who is our companion and who is our enemy.

Only after experiencing something will you realize that you are not a god, and you can't escape from your heart after all.