I noticed tonight that the world has been turning   While I've been stuck here dithering around   Though I know I said I'd wait around till you need me   I have to go, I hate to let you down      But I can't stop now   I've got troubles of my own   'Cause I'm short on time   I'm lonely and I'm too tired to talk      I noticed tonight that the world has been turning   While I've been stuck here withering away   Though I know I said I wouldn't leave you behind   But I have to go, it breaks my heart to say      That I can't stop now   I've got troubles of my own   'Cause I'm short on time   I'm lonely and I'm too tired to talk      No one back home   I've got troubles of my own   And I can't slow down   For no one in town   And I can't stop now      And I can't slow down   For no one in town   And I can't stop now   For no one      The motion keeps my heart running   The motion keeps my heart running   The motion keeps my heart running   The motion keeps my heart running