Fakegrimlock here implies that you run really hard at your ideas, and you hit the wall (fail) on the stupid ones really fast, so that you can get to the good one (win) more quickly. If you're someone whose fire is "I want to change the world" but you don't actually have a particular change in mind, this strategy will literally kill you.
Steve Bourne (yes that Steve Bourne) once advised me that I needed to have 'an agenda' which was code for that thing that one cared deeply enough about that they would be willing to commit their time/energy/soul to making it come to pass.
You can tell when a passionate person has an agenda because all of their activities are either contributing to, or attacking blockers of, that agenda. In this regard Steve was absolutely correct. Just like you can't walk a straight line for long distances without picking a point on the horizon, you can't get anything major done without having a direction picked out ahead of time.