Defying Gravity Lyrics

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

[ Lyrics from: http://www.lyricenter.com/e45717-emmylou_harris~defying_gravity_lyrics.html ]
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