When you take a no-nonsense decision towards attaining a goal, you sign up fully and keep moving towards it, not minding whatever is flung in your way.
Making the no-nonsense decision is important, because, without it, you will quit at the slightest of obstacles that cross your path.
According to Winston Churchill, success consists of going from failure to failure without loss of enthusiasm. No one gets to the top of the mountain without falling on his or her face, over and over again.
The only failure is quitting. Everything else is just information gathering.