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

Only in the eyes of plain people, life is empty and plain. Chernyshevski

A person's value should be judged by his contribution, not by his income. -Einstein

Only when people devote themselves to society can they find the meaning of that short and risky life. -Einstein

6. Everyone, who doesn't love life? Love life, and then love groups. -Qiu Jin

7. Of all the critics, the greatest, most correct and most talented is time. -belinsky

8. Observe, observe and observe again. -Pavlov

9. I am not cold, I don't know pine and cypress; It is not difficult to know a gentleman. -"Xunzi Outline".

10. You don't know the height of the sky unless you climb the mountain; Don't face the deep stream, I don't know the thickness of the ground. -"Xunzi, Encourage Learning"