Here's why:
* It's a common metaphor: The image of being pulled in two directions is a very common way to describe feeling conflicted or torn. Many people might use this phrase to describe their internal struggles.
* It could be a quote: It's possible the phrase comes from a book, song, movie, or other piece of media, but without more information, it's hard to track down the source.
* It could be original: Someone might have come up with this phrase themselves to describe their own personal experience.
To help you find the source, could you tell me:
* Where did you hear this phrase? Was it in a conversation, a book, a movie, etc.?
* What was the context? What was being discussed when the phrase was used?
Knowing more about the context could help me narrow down the possibilities.