Reality.

Here is one of my favorite quotes about not being with loved ones.  

Besides this, there is the somewhat philosophical realization that actually I have lost nothing. We may imagine what it would be like to share a given event and feel loss at having to experience it alone. But let us not forget-- that loss is imagined , not real. I imagine peaks of enjoyment when I think of doing things together, but let not the hoping for it dull the doing of it alone. What is, is actual-what might be simply is not, and I must not therefore query God as though He robbed me-- of things that are not. ... Let not our longing slay the appetite of our living.