The human self seems to be so strong an attachment, that it is impossible to do anything which has no motive of gain for "The Self". I observed my thoughts and my actions over some period of time and I noticed that almost every time it was to seek something that was profitable for the Self. I did something because I anticipated some gain for me, I wanted to help some people because I thought that was a noble way of living and thus make me a noble person, I wanted to be respected, I wanted to enhance my image of a nice person, I wanted to enhance my image of an honest person. I did something, because I was following "my ideals".
When it came to my affinity for doing something in the social service sector, was not entirely to help the people who were in need, but also to gain some satisfaction of doing something worthy. So it was not pure. It was contaminated with the desire to satisfy the self.
The only thing that came close to being unselfish, was playing the role of a parent to my (this word mine is again selfish :-) ) daughter. I don't do things because I want to be good father, I do because I think it will help her. I don't expect anything in return.
As long as you are attached, you will not be able to do anything well. To have purity in one's thoughts and actions, one needs to be detached from the rewards and expectations. To make good judgements, one needs to be detached.
I recently saw the movie "Invictus", in which Nelson Mandela says "The day I am afraid to do that is the day I am no longer fit to lead."