(a reply to that is at least as logical as this: http://pastormark.tv/2011/09/21/a-poverty-theology-parable)
Once there was a boy who had many brothers and sisters, and a very, very loving father. One day it came to pass that the boy’s sister became very sick. She was brought to the doctor and the doctor discovered that her kidneys were failing; her only hope was a kidney transplant.
All the brothers and sisters were tested to see if they were a match, but only the boy was a match. Only the boy could give a kidney. The loving father said “Boy will you give a kidney to your sister?” The boy replied, ”Oh father you are so loving and kind, can’t you just buy her one?” “No son, that will not work “said the father, “we have searched near and far and you are the only match.” “But father,” said the boy, “You are so kind and loving that you have given me the gift of two working kidneys, what would I be saying to you if I just gave one away?” “Wouldn’t that be an insult to you? “ “Son, “said the father, “please your sister has fallen very ill.”
This went on and on for days with the father pleading with the son, and the son rebuffing every argument. Sadly the daughter passed away while the argument continued on. The father was grieved but it was ok with the son because he had two kidneys, some crackers and a nice bike.