cannot be hidden’ (5:14). And all this is possible only because Christ is the light of the world. Until he has illuminated us we can never shine with his reflected light. The imperative of shining is based on the indicative of being lit up by him. Then people will see our good deeds and praise not us but our heavenly Father, who is the source of the light they see reflected. Both images have something important to say about Christian involvement in society. They militate against all forms of separation