As follows:

1. If I inherit a considerable amount of property, I may not have much value in mathematics. ——Lagrange

2. Every new group discovered is mathematical in form, because we cannot have other guidance. ——CG Darwin

3. Life is only for two things, developing mathematics and teaching mathematics. ——Pulson

4. It seems to be an axiom of character that a person's contribution is strictly inversely proportional to his pride. ——Lagrange

5. Countability rules the entire world of quantities, and the four arithmetic operations can be regarded as all the equipment of a mathematician. ——Maxwell

6. After all, it is the work of a master, extraordinary! —— Galois