The prophet and preacher gets down to the basics in this passage: answering the question what is it that you must do to be a light in the world that you live in, you must care for and serve the needs of those around you and then comes our reading.
Paul was well educated both as a Roman citizen and as a Jewish scholar, but in a way this played no upfront part when he preaches in Corinth or as here writes to them. He preaches the powerful message of Christ crucified.
Matthew in this passage of his gospel tells us more of the attitude that Jesus called for in His followers – it boiled down to doing good for others and in this way enlightening their lives.
For more detail about the readings click here.