Dreams

We are all told to follow our dreams and with work our dreams can come true.
But what if...

Our dreams are too big for us?
What if we have no way of affording our dreams?
Maybe we just aren't smart enough to make them come true?
Or in following our dream and working towards it we somehow pass up happiness that could be ours on a lesser level?
The dream scares us more than we can really explain so that anyone would understand?
What if the naysayers are right? You just don't have what it takes?
You spend years trying to follow the dream and then in the end it doesn't turn out like you planned and hoped?