Courage is the middle road between self-confidence and fear. -Aristotle

People who never show their faces can achieve great things. Tacitus

4. Don't promise others what you can't do. Once you have promised others, you must keep your promise. Washington

When you are angry, shut your mouth so as not to increase your anger. -Socrates

6. Those who are willing to sacrifice their freedom for peace do not deserve freedom and security. Franklin

7. Good temper is the best clothes a person can wear in social activities. -Dude

8. Whoever wants a dance academy will accomplish nothing, and whoever cannot dominate himself will always be a slave. -Goethe

9. Only by dedicating oneself to the society can one discover the meaning of a short and risky life. -Einstein

10, the value of life is not measured by time, but by depth. Leo Tolstoy

12, we should not waste our lives, we should be able to say, "I have done what I can." Madame Curie

13. To make others like you, you must first change your attitude towards people, relax, look natural and smile, so that others will feel like you. Carnegie

14, people who betray their companions often destroy themselves together unconsciously. -Aesop