OK, I think some apologizing is in order.
I have lost someone near and dear to me. This person was my aunt, who was like a second mother when I was a young boy. She was suffering from cancer and the punch delivered was harder than I expected because a few years before her repose, she looked like she was on the road to recovery.
Does nothing last forever? As a Christian, I know the answer is "no." But my words to Justin still stand, because the way things (and people) are do not last forever, and eventually we have to cope with this reality. Some have used tragedy to "realize" that God does not exist; others know that how they respond to tragedy shows their character as Christians. I guess I could have said as an afterword "Trust in God, Whose love endures forever," but you can't really tell an ex-Christian that (and expect him to follow through).
The first part of my response was inappropriate, I admit, but I was hoping (foolishly) that I could shock him into perspective. Judging by his response, he must have a monk's patience. So for that, I repent.