A room is a still a room
Even when there’s nothin’ there but gloom
But a room is not a house
And a house is not a home
When the two of us are far apart
And one of us has a broken heart.

-A House is Not a Home: Dionne Warwick (1964) / Luther Vandross (1981)

When krabby patties are Banned in Bikini Bottom, Mr. Krabs and Spongebob are forced to secretly sell them from Spongebob’s house. During a quick shot of Spongebob’s newly decorated place, a banner is shown with a quote from The Fellowship of the Ring:

"Keep it secret. Keep it safe."