Pope Francis' 9/25/15 Homily at Mass in Madison Square Garden

"....God is living in our cities. The Church is living in our cities, and [God and the Church that are living in our cities] want to be like yeast in the dough. She wants to relate to everyone, to stand at everyone’s side, as she proclaims the marvels of the Wonderful Counselor, the Mighty God, the Eternal Father, the Prince of Peace.
'The people who walked in darkness have seen a great light'. And we ourselves, [Christians,] are witnesses of that light" (http://www.zenit.org/en/articles/pope-s-homily-at-mass-in-madison-square-garden).