Ephesians 1:9-10 - The Uniting of Heaven and Earth

What does Paul mean when he says that all things in heaven and earth will be united in Christ? The apostle moves from what Christ did on the cross for his people – to look at the place of the cross in all of history. Robert Arendale and Mark Winder look at the concept of mystery, the language of "things in heaven and things on earth," and the culmination of this text – the uniting of these things.