A fistula is defined as an abnormal passage connecting two parts that shouldn't be linked, often leading to negative consequences. This concept implies that such connections can be harmful or undesirable, representing a violation of natural boundaries.
Diana Gabaldon, in her book "Written in My Own Heart's Blood," reflects on the nature of these connections, suggesting that some linkages can disrupt the intended order of things. The idea emphasizes the importance of maintaining separation between entities that could cause harm if intertwined.