"You have never talked to a mere mortal"

This morning in my devotions I read Paul's words in in 2 Corinthians 5:16,

"From now on, therefore, we regard no one according to the flesh."

What does that mean? These words from C.S. Lewis have been a help to me in pondering this:

It is a serious thing to live in a society of possible gods and goddesses, to remember that the dullest and most uninteresting person you talk to may one day be a creature which, if you saw it now, you would strongly be tempted to worship, or else a horror and a corruption such as you now meet, if at all, only in a nightmare. All day long we are, in some degree, helping each other to one or other of these destinations.

It is in the light of these overwhelming possibilities, it is with the awe and the circumspection proper to them, that we should conduct all our dealings with one another, all friendships, all loves, all play, all politics. There are no ordinary people. You have never talked to a mere mortal.