Joy is an important part of life, the hope, strength and value of life. Everyone has the desire to pursue happiness and the right to ask for it.
I used to measure the sky, and now I measure the underworld. The soul flies to heaven and the body rests on the earth.
Pursuing that goal in the best time of my life ... the book has been written, and it doesn't matter whether modern people read it or not. It may take a hundred years to get readers.
Mathematics has made an important contribution to the observation of nature. It explains the simple primitive elements in the regular structure, with which celestial bodies are built.