...you stepped down into darkness, opened my eyes let me see...

Beautiful song, almost could be used as a interpretive psalm of Phillipians 2....

Interesting aspect is that in Matthew 5 it is actually us, the church, who are the 'light of the world'...a though echoed in Ephesians 1.
We are the reflected light of Jesus, called to not hide our light under a bushel.
Thats an amazing thought.
All this time, I thought in that verse in Matthew, Jesus said He is the light of the world. In fact in this context, the context of the beattitudes, we are. As we become like Christ in our attitude, we display the light of Christ to the world...amazing.