The capacity to sacrifice, like any skill, always needs some fine tuning. It is one thing to sacrifice briefly one's sleep to comfort a child with a bad dream; it is quite another for a mother to sacrifice her whole career for a child. It is one thing for a father to sacrifice his desire to go fishing today because he needs to go to work to feed the family; it is quite another to work for forty years at a job he hates...Often such massive sacrifice, if not a result of cowardice, comes from an inability to discriminate between giving that is necessary and life-giving and giving that brings death to the Martyr and hence to those around him or her.