Q... Quixotic

What do you do with your quixotic thoughts?

I have this one that I've had for years. The end result is this incredible, seamless picture that I can see, very clearly, in my mind. However, the chances of it coming to fruition are minuscule. There are so many roadblocks: the attitudes of those around me, money, space, time, capability...fear.

Yet, I feel like it's this thing that just keeps poking and poking and poking at me.
Like a woodpecker.
In the back of my head.

How do you determine the difference between something being a true "calling" and being a quixotic daydream that's driven by something similar to envy? Or do you feel envious because you see your daydream being realized by someone else?

Quite the quandary that likely requires more quietude.