This sentence was invented in an era when the broad masses of the people were bound by ignorant and backward ideas, which was not conducive to the popularization of science and national construction. Originally, I wanted to say that if you learn mathematics and physics well, you can look at natural things from a scientific perspective, so you don't have to be afraid of jack-o'-lantern, tripterygium wilfordii and Hebo. Its mission is to encourage people to learn math and physics well. ~ ~ there is also an evolutionary version: it is not surprising to learn mathematical and physical English well and travel all over the world.