Jesus now points the questioner to the familiar commandments of the second table of the law. It is precisely in showing charity that our love for God is revealed. Our actions (note the what must I do?
in the question in Luke 18:18!) reveal that we are keeping God's commandments.
20 Tu connais les commandements: Tu ne commettras point d'adultère; tu ne tueras point; tu ne déroberas point; tu ne diras point de faux témoignage; honore ton père et ta mère.