Julian Fellowes, creator of Downton Abbey, on love, as highlighted in Krista Tippett's interview with Helen Fisher:

"Lust, that state commonly known as 'being in love,' is a kind of madness. It is a distortion of reality so remarkable that it should, by rights, enable most of us to understand the other forms of lunacy with the sympathy of fellow-sufferers. And yet, as we all know, it is a madness that, however ferocious, seldom, if ever, lasts... But, paradoxically, mad and suffering as one is, and the heat of the flame, few of us are glad as we feel that passion slip away. No, while most people have been at their unhappiest when in love, it is nevertheless the state the human being yearns for above all."