The Jews have a way of teaching that was based on the idea that the shortest distance between a speaker and the truth is a story.
Jesus knew this, and when addressing groups of people or individuals who may have understood a thought or a concept in their heads, but not in their hearts, he too used a story, or what we call a parable, as the shortest distance to the truth.
Now the priest, the Levite and perhaps especially the lawyer who initiated this beautiful response from Jesus, had a great head knowledge of the Old Testament law, which was not at all reflected in their hearts.
As he did on the Sermon on the Mount (Matt 5-7), and many other places, Jesus radically reinterprets this law to show its original intention. Jesus wants his listeners to understand who their neighbour is, and what love is.
He also wants them to know that this love will be demonstrated in himself for them and for us and for all the world.
