'never give up' attitude
Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time."
Thomas A. Edison
People have always known that persistence and perseverance are a key ingredient in success. Hence the old saying "If at first you don't succeed, try, try again".
And recent psychological research has backed this up. Studies of successful entrepreneurs show that the millionaires in this world possess a tremendous level of perseverance - they stick at it not just when the going gets tough, but even when others tell them to stop.