Why are mathematics so important for the success of our society?
If you understand math and logic, you have the basis for understanding the scientific method, which means you can derive knowledge and learn anyone knew. If you can understand the subject, then you can also separate truth from falsehood, and to form your own opinions around them instead.
Why is it better to read one book slow than to read ten books fast?
To get good at something, you have to practice, and by reading slow you can really grasp the meaning of the context and attain understanding, as opposed to flying through a bunch of books without ever realizing their meaning.