The call of the void is a specific type of intrusive thought. Even though you might reject these thoughts, they can pop up in your subconscious mind. They may be a response to conflicts that haven't been resolved, emotions you've suppressed or anxieties you haven't addressed.
Newsflash: you are. Astronomers call it the “local hole”, but that is quite the understatement. It is vast, gigantic, enormously huge – although, in truth, adjectives fail us when it comes to this expanse of nothingness. It is the largest cosmic void we know of, spanning 2 billion light years.