1. A cheerful personality can not only keep yourself in a happy mood, but also infect the people around you, making them feel that life is full of harmony and light. ——Roland

2. All harmony and balance, health and fitness, success and happiness are generated and caused by the upward psychology of optimism and hope. ——Washington

3. Heaven and earth provide endless pleasures for open-minded people to make them feel happy, but reject them for narrow-minded people. ——Hugo

4. Understand life and love life. ——Romain Rolland

5. People need happiness just like they need clothes. ——Margaret Collier Graham

6. All worries are gone, all burdens are lifted, and you can't help but feel satisfied for a moment. It's like having a big rock removed from your heart. ——Mark Twain

7. The path of life is drawn by the heart. Therefore, no matter how harsh the situation you are in, you should not be haunted by pessimistic thoughts. ——Kazuo Inamori

8. We have fought for joy, and we will die for joy. Therefore, sorrow should never be associated with our names. ——Fuchik

9. Only interests and outstanding talents can help you come up with ideas, be careful, and have a thorough vision. ——Balzac

10. You should not pursue all kinds of happiness, but only noble happiness.

——Democritus