The "real world" is not always so easy to live in. It is one that is marked by all the afflictions mentioned in the story of the expulsion of Adam and Eve even into our own age. It would be easy to say with some existentialist philosophers of the 20th century, that there is nothing more than the life we know here...and death...so just buck up and accept it. Jesus and his disciples had just had a big dose of the "real world" as he shared with them the terrible things that were going to come to pass in Jerusalem shortly, but a few days later, Jesus lets Peter, James, and John experience the profound rebuttle to those existenialist philosophers: he lets them see, hear, and know the presence of God in himself...and in the "real world" beyond. What the Jesuit poet, Gerard Manley Hopkins put so beautifully in words: "The world is charged with the grandeur of God."
(By the way, this homily was interrupted by a happy little dog ambling down the center aisle, smiling at the preacher, and ambling on...thus the odd interruption mid-way through!)