The universe is vast, the particles are tiny, the speed of rockets, the ingenuity of chemical engineering, the changes in the earth, the mysteries of living things, and the complexity of daily life. Mathematics is used everywhere. ——Hua Luogeng

Mathematics is a tool of knowledge and the source of other knowledge tools. All sciences that deal with order and measurement are related to mathematics. ——Descartes

Mathematics makes an important contribution to the observation of nature. It explains the simple primitive elements in the regular structure from which the heavenly bodies are built. ——Kepler

The first is mathematics, the second is mathematics, and the third is mathematics. ——Roentgen

Mathematics is the most brilliant pearl in the crown of human wisdom. ——Court

Only with the vigorous development of mathematics, a country can show the strength of its national foundation. The development of mathematics is closely related to the highest good and the prosperity of the country. ——Napoleon

Infinite! No other question has touched the human heart so deeply. ——Hilbert

When mathematicians derive equations and formulas, they get full happiness just like seeing statues, beautiful scenery, hearing beautiful tunes, etc. ——Kopning

Mathematical methods penetrate and dominate all theoretical branches of natural science. It has increasingly become the primary measure of scientific achievement. ——Von Neumann

What delights me most in mathematics are those things that can be proven. ——Russell

Devoting the best years of my life to pursuing that goal? The book has been written. It doesn't matter whether it is read by modern people or by future generations. It may take a hundred years before there is a reader.

——Kepler