2. Mathematical methods permeate and dominate all theoretical branches of natural science, and increasingly become the main symbol of measuring scientific achievements.
3. Mathematics is a tool of knowledge and a source of other knowledge tools. All the sciences that study order and measurement are related to mathematics.
There are not so many things like mathematics in reality, which have lasted for thousands of years and are really so beautiful.
I pursued that goal in the best time of my life, and this book has been written. It doesn't matter whether modern people read it or future generations read it. It may take a hundred years to get readers.
6. Educate children to stimulate interest and love first, otherwise it is just cramming and meaningless.
In the world of mathematics, what matters is not what we know, but how we know it.
8. History makes people wise, poetry makes them elegant, mathematics makes them noble, natural philosophy makes them deep, morality makes them steady, and ethical rhetoric makes them able to contend.