My host pours freshly brewed coffee and, with the charisma of an actor, regales me with tales of his travels, celebrity encounters (Liz Taylor, Salvador Dalí, Marcel Marceau), and high-fashion photo shoots in Paris. Light from the open fire bounces off the gold leaf wall frescos and polished wooden table. It feels like a film set, but it’s an 11th-century monastery in the Cévennes, Southern France, and my host is an orthodox monk. Many of us change careers in our lives, but few have undergone such a radical change as…