Perseverance - "Steadfastness in doing something despite difficulty or delay in achieving success."
Perseverance is NECESSARY if you seek entrepreneurial success. The hardest part in entrepreneurship isn't finding the initial spark, it's 3 to 6 months in, after you realize your business is going NO WHERE. EVERY entrepreneur has a day where they are launching. They think, "This is it, I'm about to kill it. I'm finally going to start bringing in the $$$." Then, it falls straight on its face.
You must PERSEVERE!
It takes WAY longer than you think (even when you think it's going to take a long time!). How you handle that first failure determines if you will be successful in the long run. The first failure scares the hell out of people (And if it's not the first, it's the second, third, or tenth). It seeds the idea of "I can't do this". You eventually hit a point where you question your own abilities.
DON'T LISTEN TO NEGATIVE THOUGHTS! PUSH THOUGH! YOU CAN DO IT! YOU CAN DO ANYTHING YOU SET YOUR MIND TO!
Thoughts be become actions. Stay positive! What defines you is not how many times you fall, but how you handle getting back up. Failure is ingrained in entrepreneurship because, "When people succeed they party, but when they fail they ponder. Therefore all great things come from failure." THIS DOES NOT MEAN YOU HAVE AN EXCUSE FOR FAILING. Every attempt is still a shot at success. The only thing you learn from failing is WHAT NOT TO DO. This does not tell you what you SHOULD BE DOING. You don't have to fail to learn something.
"Stand on the shoulders of giants." Read and learn from the greats in your industry.