1. There is no such thing as a commodity. What customers really buy is not a product, but a solution to a problem. ——Ted Levitt

2. The real purpose of a book is to induce the mind to think on its own. ——Molly

3. I’m afraid you don’t think about it often. Not many people think twice or three times a year anymore. I think about it once or twice a week, so I'm famous all over the world. ——Love Bernard Shaw

4. Doubt is the key to knowledge. ——Britain

5. A person is completely determined by what he thinks all day long. ——Emerson

6. If 50% of the people in China were gay, the population problem would be solved. ——Luo Yonghao

7. People who are good at thinking change their thoughts rapidly, while people who are not able to think become dizzy. ——Klyuchevsky

8. In artistic creation, the first idea is the best; in other things, the result of repeated thinking is the best. —— Blake

9. Only a person can stop and think. ——He Jie