There is more than one way to burn a book. And the world is full of people running about with lit matches.

This quote means that there are many ways to destroy knowledge and ideas. It is not just books that can be destroyed but other methods such as censorship or control of information. People in the world are willing to do whatever it takes to shut down new ideas or perspectives. They spread false information and do whatever damage they can. It’s like they are going around with lit matches, which means they are determined to cause destruction.