1. New mathematical methods and concepts are often more important than solving mathematical problems themselves. ——Hua Luogeng

2. Science is always unfair. If it does not ask ten questions, it will never solve a problem. ——Bernard Shaw

3. Reason is what generates self-esteem, and thinking is what strengthens self-esteem. ——Rousseau

4. Accepting an orthodox idea always means inheriting many unresolved contradictions. ——George Orwell

5. A person who knows nothing doubts nothing. ——UK