“The only difference between me and a madman is that I'm not mad.”

Simplified Meaning:

The speaker is saying that they might act in strange or unusual ways, but they believe they are still sane. Imagine an inventor who creates weird, new gadgets nobody has ever seen before. Some people might think the inventor is crazy because the inventions look odd or different. However, the inventor knows exactly what they are doing and has a clear idea behind their work. In history, people thought some scientists were crazy when they proposed new ideas, like when Galileo said the Earth revolves around the sun. At that time, many thought he was out of his mind. However, he was actually right and was just ahead of his time. So, the quote can be understood as a reminder that being different or thinking outside the box doesn’t mean a person is crazy. It encourages people to trust their unique ideas and perspectives, even if others don’t understand them at first. It’s about having confidence in oneself and knowing that there’s a method to what might seem like madness to others.