How many ships didn’t sail because of the belief that the earth was flat? How much progress was impeded because man wasn’t supposed to breathe underwater, fly through the air, or venture into outer space? Historically, we’ve done a remarkably poor job of estimating our limits. The good news is that science isn’t about guessing, but rather the art of progressing. And so is your life. None of us knows our limits. Borders and boundaries may be clear on a map, but when we apply them to our lives, the lines aren’t so apparent.