Author Neil Gaiman:
Trust your obsessions. This is one I learned more or less accidentally. People sometimes ask whether the research or the idea for the story comes first for me. And I tell them, normally the first thing that turns up is the obsession: for example, all of a sudden I notice that I’m reading nothing but English 17th century metaphysical verse. And I know it’ll show up somewhere—whether I’ll name a character after one of those poets, or use that time period, or use the poetry, I have no idea. But I know one day it’ll be there waiting for me. You don’t always use your obsessions. Sometimes you stick them onto the compost heap in the back of your head, where the rot down, and attach to other things, and get half-forgotten, and will, one day, turn into something completely usable. Go where your obsessions take you. ... Your obsessions may not always take you to commercial places, or apparently commercial places. But trust them.”
(Source: 1997 PRO/con speech)
'17th century metaphysical verse'? Jfc