Even though we often know better, we tend to look at success as a straight line going from a low point A to a much higher point B. As comedian Dimitri Martin points out in the sketch above, success is much more of a squiggly line than a straight one.
We like the straight line because it's clean and simple. It makes success seem possible and clean, but reality doesn't share that depiction more often than not. The squiggly line may be a mess, and hard to understand, but it accounts for failure, missteps, bad luck, and all the things that might discourage you along the way. So however you define success, expect a messy -- but ultimately great -- path.