The classic quotes of the Gotham Joker include:

1. I am just a dog that chases cars. I don’t know what I’m going to do at all, but once I catch up, I’ll have something to do.

2. I am not just a person, I am an idea. I will continue to live in the shadows, living in Gotham's discontent.

3. You see, madness is like gravity, sometimes all it takes is a gentle push.

Note:

The Joker is a supervillain under the American DC Comics. He first appeared in "Batman" Volume 1, Issue 1, and is Batman's number one opponent. The number one comic book villain voted by the American media.

The Joker does not have any superpowers, but he has intelligence and elusive thinking far beyond ordinary people. Director Gordon also said that the clown's fingerprints, DNA, dental records, etc. were not consistent. He was wearing a costume or customized clothing, no tags, and only had a knife and bandages in his pocket. Every time the clown commits a crime, he leaves behind a JOKER playing card (king).