Diane's answer is quite illumining in the sense that it is the Ego that traps us, makes us think or believe that we are more than who we really are. Humility is lacking and as such we become exposed to Impediments (sin) a transgression of universal laws or an obstacle standing in the way of Love or Light.
Back to your question. Jesus was a real human and Lucifer largely symbolic to describe the negative, that which pulls us away from the Light and into darkness.
Jesus, The Christ, was an Advocate of a Higher Light or the Supreme. Lucifer is also an instrument of the Supreme. In that sense they both perform according to the Will of the Supreme.
Speaking from a poetic point of view, a rose would be like a morning star, or the dawn, if you like. A thorn will be more like Ignorance, suffering. The Christ represents Light or Love and Lucifer darkness. Both Light and shadow, are the dance of Love. Much Peace, Lamsam.