"すでに起こったという別の理論があります"

Simplified Meaning:

The quote talks about the idea that things we think might happen in the future have actually happened already. Imagine you are watching a TV show, and you're wondering what will happen next. However, someone tells you that they've already seen this episode, so all the surprises and events are already known. That’s like this quote – it’s saying that what we are thinking about as future events or theories might have already taken place. A good real-life example could be how historians study ancient civilizations. They might find new evidence and think they are making new discoveries. However, this new evidence could show that the events they are discovering actually happened a long time ago, and they're just uncovering what’s already occurred. People can apply this idea by understanding that sometimes, the answers or outcomes we are looking for in the present are already available or have happened in the past. Instead of worrying too much about what might happen, it's useful to look at what has already occurred to gain perspective and understanding. This mindset can help people feel more grounded and less anxious about the future, knowing that many things they are concerned about might just be history repeating itself.