In the parable of the Good Samaritan, an expert in the law was asked to distinguish which of three men acted the most "neighborly" to a stranger in desperate need. The expert correctly determined that the man who rendered aid to the person in need, rather than the two others who ignored him, was the neighbor. It is from this story that we derive the popular adage "Love your neighbor as yourself."
While for many these may be words to live by, imagine the case where a person attempts to render aid to another, but is then sued for the result of his or her assistance. Picture a doctor who happens upon a man bleeding to death on the side of the road. Should she stop to help? Common sense and morality would dictate, yes. However, the doctor is under no legal duty to render aid, and may even ignore the bleeding man, particularly if there exists the threat of litigation for her help.