How to interpret this line of the clown in Batman?

I'm not crazy. I'm sober, but I'm ahead of myself. I'm not crazy. I'm sober, but I'm ahead of myself.

Don't talk about benevolence and morality like them, you are not one of them! Anyway, you can't fit in. To them, you are just a monster like me. They need you now. When they don't want you, they will crowd you out later. Look at their moral standards, their laws and regulations: this is just a bad joke. When there is danger, they show their true colors. Only in times of peace and prosperity can they live in harmony. I will prove to you that these so-called civilized people will kill each other in a crisis.