" The first rule of world-building is available physics, which basically means that if you want it to feel real, it has to follow the same rules as this world, from gravity to how human behaviour works. If you have a fantasy element that doesn’t obey the laws of physics, make sure that it has a fantasy explanation. "
- Trudi Canavan

The first rule mentioned by Trudi Canavan highlights the importance of grounding a fictional world in realistic physical laws and human behavior patterns. This means that when creating a fantasy or speculative setting, elements within it should adhere to the rules governing our reality as closely as possible unless there are specific explanations for why they deviate from these norms.

Delving deeper into this quote, Canavan emphasizes the balance between imagination and believability in world-building. A well-crafted fictional universe can introduce fantastical elements that challenge real-world physics but must also provide a coherent internal logic or "fantasy explanation" to maintain the reader's suspension of disbelief. This approach allows writers to explore innovative concepts while keeping their stories grounded enough for readers to engage with them emotionally and intellectually.

Trudi Canavan is an acclaimed author known for her intricate world-building in fantasy literature, particularly within series such as "The Black Magician Trilogy." Her extensive experience in crafting complex and immersive fictional worlds has earned her recognition among both critics and fans of the genre.