These two very basic questions are the pivot points around which the first 4 seasons of Babylon 5 (Wikipedia entry) revolve. As we learn in Season 4, it is the fact that these questions are not asked together is what is causing the war that is going on at that point in the series.
Mark Galli, the managing editor of ChristianityToday.com, had an interesting commentary the other day,
I Love, Therefore You Are. He actually tackles those two questions, and I found his answers helpful.