...in one's bones

[shootingstar]

Stage Manager: ......I don't care what they say with their mouths - everybody knows that something is eternal. And it ain't houses and it ain't names, and it ain't earth, and it ain't even stars ... every body knows in their bones that something is eternal, and that something has to do with human beings. All the greatest people ever lived have been telling us that for five thousand years....
(Thornton Wilder, our Town, Act III)

What do you take ..in their bones to mean in this context? Your help is much appreciated.

 

[5jj]

What do you take ..in their bones to mean in this context?

Deep inside them.

 

[Skrej]

Of course, in this context it's also a bit of a pun, because most of Act III is dialogue between the ghosts of dead townsfolk talking to each other. The scene mostly takes place in a cemetery. Ghosts in the play gain a sort of omniscience with their death, hence the play on words.