Tal -
There will be times in life when you receive amazing gifts from unexpected sources. You think to yourself "why would they be so kind to me? How did they know how much I needed that?" There is your payback. Your love has 'come back to you'. The energy you are putting out will come back to you, not from that neighbour but from someone else, perhaps when you least expect it.
Ok, I can buy that - to a certain degree. But if this is true, then we can not say that it will come back to us "ten-fold" or "many times over" because I can say without a doubt that if I had been keeping score my whole life, I would be owed a whole lot more than I've gotten so far. And if I were to die as soon as I hit the "send" button, there is no way for me to recoup that. So, either the premise that it comes back to you "multi-fold" is wrong, or there is no equality here on earth where we will be paid back for the love we put out to others.
Just my .02,
growedup the party-pooper