Happy lily, never to be saddled with an idee fixe, never to be in the grip of a monomania for happiness or love or fulfilment.
Darrell thus put into Lady Adela's head, he remained there, and became an idee fixe.
Germans are the 'idee fixe', and without an 'idee fixe', as you know, there's no such thing as religion.
idée fixe i·dée fixe (ē-dā fēks')
n. pl. i·dées fixes (ē-dā fēks')
A fixed idea; an obsession.