The purpose of a torch is to bring light to the surrounding darkness. The torch does it job by shining brightly.
It is your responsibility to shine your light to your world. Why? Because you are a light. And light shines.
Your daily activities reflect your light or darkness. If you are full of evil deeds, it will reflect and if you are doing good, it will reflect also.
The difference is that people around you can tell whether you are a good person or a bad person.
Shine your light and let it affect people around you. Remember, your light is the “work” that you do on daily basis.