Failure to them is not final, but an important step to learn and prepare for the next step to success. They are prepared to rough it out when times get really bad. Many entrepreneurs do not become successful overnight. This feat is certainly not for the weak-minded. It requires great motivation, determination and mental strength to persevere to the end.
Some people think that entrepreneurs are motivated by their greed for money.
I beg to differ. A motivation driven by materialistic greed will not be able to withstand the test of time. In the above cases, those entrepreneurs would have given up long ago before they tasted the fruit of success. Wealth is a by-product of success, and should not be seen as a goal in itself. Drawing from my own experience, I believe entrepreneurs are driven by a mission that we uphold religiously and faithfully with our lives.