You may not be smarter than everyone else. You may not be as talented. You may not have the same great connections, the same great environment, or the same great education.

You may have none of those things.

But you can substitute effort for intelligence -- because, over time, effort results in skill and experience. You can always be more persistent than others. You can always be more disciplined.

That you can control.

And that, science says, will have the biggest impact on your pursuit of success.