His theory of natural selection is one of the most influential scientific theories ever proposed . However , he met many stumbling blocks before scientific research. His many theories were proved that they were wrong. In spite of these frustrations, he was still confident. And making more effort to his research. Eventually, he succeeded .
His success tells us that failure is the father of success. We should learn his “never give up spirit", perseverance, exploration and will-power. He is the role model of us.