there are lots of examples about a person"s perseverance bringing about changes in history. or new discoveries in cures for some human diseases the well-known history of the revolution in 1911 is a good example through a hard struggle with many failures for almost three decades, dr. sun yat-sen with his people free themselves from a corruptive government of the last dynasty likewise if one wants to succeed in pursuing his serious goal in his life, perseverance is always the necessary characteristic he should learn to have.