Then the person you've been to heck and back with, who actually does make the sun shine brighter, quietly whispers "love you." And you can feel it from a continent away. Bone deep. Breath catches and your keel is put even.
Or watching two kids on a train, clearly best friends, share a set of headphones and laugh helplessly together, each pointing at the other when things that they are listening to strike home [and I'm talking all dignity lost laughter] and you cannot help but think that love, in all its amazing forms, is very much alive and doing its thing.