This incident occurred one morning outside Albert Sch-weitzer's hospital in the African jungle.A patient had gone fishing in another man's boat.The owner of the boat thought he should be given all the fish that were caught.Dr.Sch-weitzer said to the boat owner：

“You are right because the other man ought to have asked permission to use your boat.But you are wrong because you are careless and lazy.You merely twisted the chain of your canoe round a palm tree instead of fastening it with a padlock.Of laziness you are guilty because you were asleep in your hut on this moonlit night instead of making use of the good opportunity for fishing.”