1. Since there are black spots on the sun, it is even more impossible for "things in the world" to be without defects. -Chernyshevski

2. When you are used to pessimism, it will be as pleasant as optimism-Bennett

3. The world is like a mirror: frown at it and it will frown at you; Smile at it, and it smiles at you. -Samuel

4. We should not force all kinds of happiness, but only pursue noble happiness. -democritus

5. If life deceives you, don't be depressed or angry. Believe it, and a happy day will come. -Pushkin

6. Although a pessimist is still alive, an optimistic person will never grow old. -Byron

7. Work is the value of life, and the joy of life is also the place of happiness. -Rodin

8. If a person is optimistic, everything has resistance, everything can resist, and everything will enhance resistance-Qu Qiubai

9. If a person is afraid of pain, diseases, accidents, danger and death, he can't stand anything. -Rousseau

1. Belief is a great emotion and an inventive strength. -Gorky

11. I can take anything away from people, but there is one thing that I can't do, and that is the freedom to choose my own attitude towards life under certain circumstances. -frank

12. the so-called inner happiness is the happiness that a person feels when he leads a healthy, deformed and coordinated life. -romain rolland

13. Laughter is sunshine, which can dispel the winter color on people's faces. -Hugo

14. The so-called inner happiness is the happiness that a person feels when living a sound, normal and harmonious life. -romain rolland