If you don't expect it then you won't miss it

   When you lend someone a helping hand it is to help them not think that now they owe you for helping them. 

   You helped to help them not help yourself, because that would be considered taking advantage of someone when they needed help. 

  When you don't expect anything from them then you won't be upset when you don't get anything because you didn't expect anything.

  It is what it is and it ain't what it ain't. 

  Do what you want to do because you want to do it. 

  Don't pretend you are helping someone if in reality you do it so they will help you later because you helped them. 

  A helping hand purely to help them.