Common Kibitzing

I struggle with the same things, and the best I've come up with is this: whether or not yourexistance has a grand purpose, you're here. Live in the most loving way you know how, and figure that the little gestures will, on ocassion, probably unbeknownst to you, have an important affect on someone. Existance is self-justifying, and love (in the sense of agape) is the greatest virtue. Just do what you can.