Messages in a Bottle Across Universes

Write a story based on the concept of messages being sent back and forth between our universe and a parallel one.

This prompt encourages the exploration of empathetic, emotional, or philosophical conversations between individuals from entirely different universes. The interchange could range from simple letters to complex means of communication. The core of this communication, the impact on the individuals and the potential consequences of their exchange, would be the focal points. Deeper themes could include the nature of understanding, empathy, wisdom, and difference.