Okay kiddo, so, C.W. Leadbeater was a man who lived a long time ago and believed in some pretty interesting things. He thought that there was more to the world than we can see with our eyes and that there were other dimensions or "planes" that we could explore if we knew how.
He also believed in something called "clairvoyance," which means being able to see things that most people can't. This might sound scary or strange, but Leadbeater didn't think it was a bad thing. He believed that it was possible to use clairvoyance to learn more about ourselves and the world around us.
One thing that Leadbeater was really interested in was spirituality. He thought that people could connect with something bigger than themselves and that this would lead to a more fulfilling and meaningful life. He also thought that there were spiritual beings, like angels or devas, that could help us on our journey.
Now, not everyone agrees with what Leadbeater believed, and some people think that he was just making things up. But either way, he was definitely a very interesting person who had some unique ideas about the world!