how to live a meaningful life? it has disturbed many famous people all through the history; among all those answer I can't agree more to the remark that goes like " the greatest use of life is to spend it for something that will outlast it." it's brilliant thought encourage me to pursue what really cost. nowadays many citizens live in a much faster speed than ever before to reach so-called average life standard. whatever they tried so hard they hardly find the happiness, even they reach to the best economic class they couldn't image before. In contrast with those hard-working man, others who spend their time in studying what contribute to the science always seem happy with the satisfaction of their achievement. and some normal person around us who were devoted to the society with their small power, they always live for the others and tie the world tightly, life extend out of their life and shine forever. all in all, pursuing for the greatest life we just need to try our best to serve for people around, concentrating thing out of ourselves can decrease pain and others problem burdening us.