You are the light of the world. A city that is set on a hill cannot be hid.
All Commentaries on Matthew 5:14 Go To Matthew 5
Hilary of Poitiers
AD 368
He calls the flesh he has assumed a city. For as a city consists in a variety and multitude of inhabitants, so by virtue of his assumed body he contains in himself a certain union of the entire human race. Thus he becomes a city by our union in him, and we through union with his flesh are the community of the city. Therefore he cannot be hidden. Situated on God’s lofty height, he is held up to all in admiration of his good works as deserving of contemplation and understanding. But a lamp is not to be lit and hidden under a bushel. For what benefit is derived from keeping light enclosed? Thus the lamp of Christ must not be hidden under a bushel. … Hung on the wood of the cross, it sheds everlasting light on all those who dwell in the church.