This works for something like doing an Ironman, where it's up to you and only you. That's how I did my Ironman.
But it doesn't work like that for things that don't just depend on you, like doing a startup or closing a deal, even of you "Commit to it like a madman. Plow through like a Klingon. No looking back. Celebrate." You have to be very careful about this, because when the "Celebrate." part doesn't come, you'll learn how low the lows really can get.
Agreed, but the important thing to remember is that it's not about completing the goal, but rather working towards it. That's a very important distinction.
For example, you can still work on your startup even when others are sabotaging it, rejecting you, etc.
But it doesn't work like that for things that don't just depend on you, like doing a startup or closing a deal, even of you "Commit to it like a madman. Plow through like a Klingon. No looking back. Celebrate." You have to be very careful about this, because when the "Celebrate." part doesn't come, you'll learn how low the lows really can get.