People have two ways of life. One is to live like grass. Although you are alive and growing every day, you are a grass after all. You absorbed rain and sunshine, but you didn't grow up. People can step on you, but they won't feel pain because of your pain. People won't pity you because they haven't seen you, so we should grow like a tree. Even if we are nothing now, as long as you are trampled in the middle of the soil, you can still absorb nutrients from the soil and grow on your own. When you grow into a towering tree, people can see you in distant places and come near you, and you can give people a piece of green. Living is a beautiful scenery, and dying is the pillar of talent. Birth, old age, illness and death are all useful. This is the standard for each of us to live and grow.