Where is the thesis?

I am begining to think that there is no thesis in the following extract from Northrop Frye's "Don't You Think It's Time to Start Thinking?" Am I correct, or is there a thesis?

"A student often leaves high school today without any sense of language as a structure.

He may also have the idea that reading and writing are elementary skills that he mastered in childhood, never having grasped the fact that there are differences in levels of reading and writing as there are in mathematics between short division and integral calculus.

Yet, in spite of his limited verbal skills, he firmly believes that he can think, that he has ideas, and that if he is just given the opportunity to express them he will be right. Of course, when you look at what he's written you find it doesn't make any sense. When you tell him this he is devastated.

Part of his confusion here stems from the fact that we use the word "think" in so many bad, punning ways. But of course, he wasn't thinking at all. Because we use it for everything our minds do, worrying, remembering, day-dreaming, we imagine that thinking is something that can be achieved without any training. But again it's a matter of practice. How well we can think depends on how much of it we have already done. Most students need to be taught, very carefully and patiently, that there is no such thing as an inarticulate idea waiting to have the right words wrapped around it.

They have to learn that ideas do not exist until they have been incorporated into words. Until that point you don't know whether you are pregnant or just have gas on the stomach.

The operation of thinking is the practice of articulating ideas until they are in the right words. And we can't think at random either. We can only add one more idea to the body of something we have already thought about. Most of us spend very little time doing this, and that is why there are so few people we regard as having any power to articulate at all. When such a person appears in public life, we tend to regard him/her as possessing a gigantic intellect."

Note: Instead of copying the entire essay, I copied only the first few paragraphs.

Thanks in advance!