I realize this more and more as I age.
Tonight, my daughter and I played towerfall on ps4 against each other, and the pure joy coming out of her (of us both) was infectious and amazing. She eventually cajoled me into standing up for each round, fully immersed in the fast-paced matches. Tomorrow I drive her over to bitchface and lose her for a week.
There's no happiness in that for me, but I can clutch onto each smile, each laugh, each moment with her and hopefully begin to appreciate the incredible gift I was given. She is light.