-As they are listening, Jesus’ hearers would have known Light as symbolic of God Himself (2 Samuel 22:29, Psalm 18:28, Psalm 43:3).
-When Jesus proclaims “you are the light”, He commands His followers to be what He Himself claimed to be (John 8:12).
In response to the proclamation "you are the light", Jesus gives us only two choices:
1. Shine ( “it gives light”)
2. Cover your light (“put it under a bowl”)
-The implication is that, as believers, we have to actually work not to shine.