Do we hold the light or is the light already there?

I just read Leonard Sweet's book, Nudge.  In that book he has challenged me to rethink a number of things.  I want to know what you think.

As Christians we say, we take the light of Christ out to the world.   This of course implies that we hold the light and are going to enlighten the rest of the world.

Sweet challenges us to understand that God is already present in the world and active in people's lives.  They are not aware of it.  Our work as Christians is to develop relationships in the world and nudge people to realize the light of Christ that already exists in them.

What do you think?  Old evangelism:  we have it and the world needs it.  New evangelism:  it exists everywhere we need to help people realize it.