It is human beings who do not, and could not possibly, get the full value of the good they bring to others. By the time a good deed reaches its result in the other, the benefactor may be dead or far away and know nothing about it. At best, no human being can fully share in the experiences he or she helps others to enjoy. Nor can we fully share in the sufferings we cause others. Our limited power to perceive and understand guarantees that. Hence there is need for us to be willing to furnish others with values we are ourselves unable to fully profit from. Every parent or teacher experiences this. Accordingly, we will, if we are ethical, try to bring good to others some of which can never become our good.