This GCSE RE Christianity quiz tests you on Christians in society. Being a Christian is not just a matter of personal choice or conviction: God working in and through one's life should be visible to others, so that one becomes 'instrumental' in the working-out of His purposes for the world (so believers believe). Jesus Himself spoke on a number of occasions about believers being like ‘salt’ ~ bringing flavour to life around them ~ and like a shining light (that image again: here, most probably denoting energy, clarity, direction and companionship). A Christian without those quietly assured, leading qualities ~ in appropriate circumstances ~ would invite the disappointment of missed opportunities to have changed matters for the better.
There can be no simple universal rulebook for how all Christians should live-out their faith, since the circumstances, and their own talents and opportunities, are bound to be so varied.