I remember this one comic strip with Calvin and Hobbes, where Calvin asks Hobbs why people dream and Hobbes says it's probably because if they are in each others dreams then they can meet and still play.
The artist actually drew that strip after his cat died, so remind himself that even though the cat was gone, they would still meet each others in their dreams.
I always found that to be very beautiful. And true. It's been years since I lost Kelly but I still have dreams where she's alive and well and those dreams always mean so much to me