Sleepless in Wayzata

I had a gut wrenching, isolated talk with a 10 year old boy tonight at our Halloween party. This boy has endured unspeakable tragedy recently. His Dad, my age, just died; no warning. My words to the distraught boy, which I deemed well selected at the time, seem empty in retrospect. The only thing that I could think of, in general substance conveyed over several minutes, was that "as unfair as this is, you have got to keep going on living your life one day at a time, while always honoring his memory." After an hour in bed trying to figure out how I might have selected my words differently, and still coming up empty, I gave up and got up seeking a way to distract my thoughts. So far, it isn't working.

What do you say to a 10 year old who just lost a parent?