Karma protects us from ourselves.
we have senses deep within  that may be far advanced for our own level of consiousness to see clearly.
   As we grow, we make mistakes.  It is only natural that we learn from them.  We set boundarys for ourselves. 
when any part of our self goes beyond our own limits, we have traps that have intent to protect ourselves.
karma is a sense we created that connects ego and self worth.  
& it is true that all good deeds are not neglected.   your own rule...

parts of karma involve "trust", "patience", "hope", "creativity", "self worth".....