Every goal that we have must be derived from a vision we have for our future. 

Without a vision, goals appear arbitrary. They fail they 'So what?' test.

So what if I fail on achieving this goal? 

Only a compelling vision can keep us motivated because it makes it very clear to us as to what happens if we fail to achieve a goal. It makes it clear that the future will not be like we have imagined.

Start by clarifying the vision.