Give to inspire, not to get.

When we expect something in return for our kindness, it becomes selfish.  We diminish the act itself.  The goal is to let others see the goodness in the world and, hopefully, inspire them to do the same for others.  It is not done to receive a “thank you”, a compliment or favor in return.  It is about the other person and any people after that who are inspired to do the same.  THAT is how kindness spreads.  The more people we uplift, the more likely it is that some will pass on the kindness.