What are the chilling sentences between sisters?

As follows:

1. Since you think our friendship is a joke, forget it, then break up, it's no big deal.

2. No one will meet a few scum in life. Scums are not only men, but also sisters.

3. I don't blame others, but I don't know people clearly. I treat my sister as a relative, but my sister treats me as a joke.

4. Sometimes it's not that the world is too hypocritical, but that we are too naive in the world.

5. What is superfluous? It's a quilt in summer, a fan in winter, and me in your eyes.

6. Thank you for teaching me another lesson in life, that is, don't give your heart to someone casually, because it doesn't necessarily bring you heart.