Be persistence!

There are a lot of celebrities in history who are suceed after the failure over and over again, don't be pessimistic, don't give up. Thet why they finally achieved success. Edison is such a persistent person, invent the light bulb, which benefits our mankind. He tried to use more than 1600 kinds of materials, all of them were failed, but he was not defeated down, in the face of failure over and over again, he is very optimistic, he firmly believe: "failure is the mother of success!" He continued to work day and night and tirelessly. Later, he tried more than 6000 kinds of materials and made more than 7000 tests. After 13 months of efforts, he finally succeeded in inventing the light bulb. His perseverance and spirit of not giving up is just like the old man in the book! Keep optimistic attitude, never give up is so important in our life, we meet with difficulties in learning and difficult problem, also can't give up easily, to persevere, hard, dare to face difficulty, dare to challenge problem, only in this way, we can study on the progress, can be a useful person to society!