I disagree. The loved ones left behind are still, uh, living. For however long that lasts, they will miss the departed. It's similar to someone going on a trip. I'm reminded of a newlywed couple I know. Before they got married, one of them went overseas. They missed each other terribly, even though they knew they would soon be reunited, and could still talk to one another. You got two of the emotions involved in your last sentence. You missed one.
And if it is complete faith you're discussing, the quote marks around knowledge are unnecessary.
