I think about Eternity. A lot.
Sometimes at night I think about Heaven and how, when I shut my eyes there (if sleep is needed), I will not have to worry about how haggard and worn and sorrowful my soul might feel in the morning. The groanings of its interior and the emptiness I often feel here on earth will be filled to the brim with beautiful light and unending peace. Perfected by the fulfilled promised of Christ's blood on the cross.
It's humbling and at the same time, it is still often very difficult to think much past the here and now, on this earth. I fail so much still and sometimes, His death is not enough. Sometimes it's forgotten about; shoved to the corner recesses of my mind as life looms and weighs on me. But we are called to live not for this life but for Heaven, for Eternity. To keep in mind the simple fact that Christ died so that we might live in Him.