It seems mathematics is a progression toward relative and free models.

I get the whole line of reasoning more than every small instance of reasoning in my book, but that's why there are problems to work on.

I'm not to the point where I can write a textbook.

Delineating a series of concepts builds and builds and builds. It is not like a story that has a peak and tail off. Instead, it always builds.

Simply the idea of linear independent vectors forming a basis means that any two objects can create its own universe.