Pastor Aaron Putnam gives this message based on Isaiah 60.  Aaron is director of LINC Bay Area.  LINC is Lutheran Inner City Mission Coalition, which helps people who have a vision and desire to be pastors or evangelists realize their calling through mentoring.  Rev. Putnam's message is about being a light in the darkness.  At times our presence in this world can be like exploring a cave where darkness surrounds us.  But God's word is light for us and the world.