Defying Gravity lyrics

(Jesse Winchester)

I live on a big blue ball
I never do dream I may fall
But even the day that I do
I jump off and smile back at you
I don't even know where we are

But they tell us we're circling a star
Well I'll take their word I don't know
But I'm dizzy so maybe that's so

I'm riding a big blue ball
I never do dream I may fall
But even the high may lay row
So when I do fall I'll be glad to go

Submitted by Guest

What do you think is the meaning of Defying Gravity by Emmylou Harris?