The amount of things that need to be known is infinite. Everyday you learn new things, but 1 + 1 is as far from infinity as 1 is. You've all read what Paul Grah

The amount of things that need to be known is infinite. Everyday you learn new things, but 1 + 1 is as far from infinity as 1 is. You've all read what Paul Graham has written about blub programmers? (http://www.paulgraham.com/avg.html http://www.paulgraham.com/avg.html). To some extent, we are all blub programmers, all the time. In Graham's example, there is a programmer who does not know of a powerful programming language that could help them, but if you happen to know the most powerful and perfect programming language in the world, there is still an infinite realm of things you do not know that would be helpful to running a business - facts about accounting, changes in the tax codes in all the different countries where you'd like to operate, the languages spoken by humans in those countries, the culture of those countries, and the changing behaviors among young people, old people, and those in the middle, facts about the law, torts, libel, what is and is not allowed in advertising, facts about management and human relations, dealing with diverse work forces, integrating cross functional teams, the right way to motivate, facts about sales and the psychology that prompts people to buy or not buy, how to close, facts about large organizations, navigating their hierarchy, discovering the right person to contact, facts about personal motivation, avoiding burn out in yourself and in your employees, balancing the changing needs our bodies and minds present us with, facts about larger trends in our industries, facts about whatever chemistry or physics underlies the work we do, and possibly impacts it... I could go on forever, because the list is pretty much infinite. My point is, we are all infinitely ignorant and therefore we fall into the category of "didn't know that I couldn't do it". I think what matters is ambition. Motivation counts more than knowledge or lack of knowledge. One figures out what one needs to along the way.