Well said, Mr. Emerson. Let me just start with a little analogy here, if you don't mind.
"If a purpose or a desire is our wood, then enthusiasm is the fire."In other words, we can have as many goals and 'wishes' as we can think up AND tell the whole world, but if deep down we don't have real, lasting enthusiasm for those goals, then I'm afraid it will become just another project put on the backburner.
How do you get enthusiasm?
That's the easy part. In order to light the fire/enthusiasm, one must first have wood/goal.
What do you love? What do you care about so deeply that you would get involved with it for free and be happy to spend hours working on it?
Start there. If it's the right purpose for you then the enthusiasm will naturally follow, otherwise ...