You can verbalize your thoughts, but that is just one of the ways you can think. You could include everything you process from the outside world as thinking. Most people verbalize their thought more than others.
I updated the article a little bit, it might be worth reading it again.
RE: We are living inside a natural matrix, the world around us is only accessible through a nervous system. Language can be used to manipulate our thoughts and now I have an idea of how it all works.