OWN / Zak Bickel / The Atlantic Iyanla Vanzant can make a grown man cry with very little effort. The reality-television host, whose eponymous show runs on the Oprah Winfrey Network, has an aura of emotional seriousness about her: a penetrating, hellfire-and-brimstone stare; a booming, movie-announcer-style voice; the body language of a diva.