What is happiness? Write five sentences, and the first volume of the fourth grade is a text.

Only by working with both hands and doing things that are beneficial to people can happiness be created. Happiness comes from labor. Labor follows happiness, and with labor, there is happiness; Without labor, there is no happiness. Happiness is often accompanied by labor. As long as you work hard, there must be happiness behind your labor. Only by studying well, reading well, listening well and getting excellent grades can we be happy. People who study well can also teach others how to analyze and understand themselves, which is also the way to get happiness from learning.