Kindness is difficult to give away because it keeps coming back.
One small action leads to another, which can lead to many. Your actions may inspire others to do the same, with far-reaching results that completely outweigh that first effort. You'll probably have no idea how much of a total effect your actions will have. But that kindness will often be paid back two-, three- or even tenfold. If not from the person you helped, then from someone further down the "kindness" chain. So go try it out! Do a kind thing for the next person you meet, and see if you don't get a positive return.
Just thought that was worth posting today.