One More (awful) Bit

So I just found this excerpt from Palin's book (because I still refuse to purchase it), and I couldn't help but post it:

I know for sure that I could carry on, like he, and we, have done together all of these years on this long, Iron Dog race of a marriage that is at once grueling and celestial, onerous and majestic.

Can anyone (and I mean anyone) decipher meaning from that sentence. Anyone? I didn't think so. Fingers crossed for Obama 2012.