Having someone commit a good deed would at first glance mean that the "doer" or the deed would be, in all stresses, all good or all beneficial. However, the person that does a good deed must be already accepting of the risks involved with acting in the name of good. What said person may or may not consider is the aftermath; the events beyond the good act in question. Think along the lines of "the road to Hell is paved with good intentions," where as one intends to do good through his or her actions, but the outcomes end up being worse than the preset scenario. The hero must be ready to assume the risks and the consequences, rather than expect praise for doing the right thing.
In the idea of a selfless hero, they think of others before themselves. A Heroic Sacrifice has the hero sacrifice themselves for the sake of others. This is a good deed with the hero assuming the risk of the event that saves others (friends, enemies, complete strangers, etc.). These others have been saved by the hero offering up his or her life in exchange. There is the immediate cost of the hero, his or her life, but the punishment ends up falling on the people saved and the cost may or may not be apparent at first: like PTSD from the event; any close relationships with the hero will have each of the participants grieve their passing; the hero may have been the one keeping the planet from becoming a Crapsack World, thus without them, the world falls to the forces of darkness.
The cost of heroism is not immediately apparent, especially to those that Jumped at the Call, as there is a surcharge and a tax to being a hero.
