There’s something about being steadfast—about being able to keep a level head and firm resolve in the midst of uncertainty or in the face of opposition. No, it’s not easy. But it’s fundamental to doing anything of significance, because anything worth doing will involve times of difficulty, requiring you to keep going. And it’s this resolve—this steadfastness—in the face of pressure to turn or quit, that can make all the difference between success and mediocrity.