There is a very powerful energy that is emitted when a person sincerely smiles. This energy is terrifically healing even to the physical body. And if an individual is not emitting this energy themselves then they are unable to transmit healing energy to another.
Again... this is NOT an issue of casting judgement regarding anyone as being 'good' or 'bad'. And I am fully aware that a tremendous amount can be learned from people who carry very dense energy. Nevertheless, as I said before, our energy is also reflected in every aspect of our being. And people who are suffering are not energetically capable of being effective healers.