2. Mathematics has made an important contribution to observing nature. It explains the simple primitive elements in the regular structure, with which celestial bodies are built. Kepler

3. Mathematical methods permeate and dominate all theoretical branches of natural science. It has increasingly become the main symbol of measuring scientific achievements. Von Newman

Mathematicians are fascinated by nature. Without infatuation, there is no math. -Noel

Mathematicians are as happy as seeing statues, seeing beautiful scenery and hearing beautiful tunes when deducing equations and formulas. -Kopnin

6. No problem can touch people's emotions as deeply as infinity, and few other concepts can stimulate reason to produce rich thoughts as infinity, but no other concepts can be clarified as infinity. -Hilbert

7. Mathematics is the key to science. bacon

8. Mathematics is symbol plus logic. Bertrand Russell

9. Mathematics is a variety of proof skills. -Wittgenstein