I've never really been to type of person that cares about what other people think of me.
However, I feel good when I find out that I've had a positive impact on someone's life. - perhaps you can relate.
That good feeling is not based on me assuming that they must have a good opinion of me.
It's based on knowing that what I am doing / saying influences or affects those around me in a good way
The most important thing about this occurrence is that it is a very clear indication that I am on the right path and am doing the right thing.