Coral Castle: A contemporary mystery

I have just discovered this Megalithic mystery building in Florida, and it is not 3.000 years old but was built in the 1920’s!

The building is Coral Castle, and was the home of Edward Leedskalnin, a Latvian immigrant living in the US. He built this “castle” to serve as his home between 1920-1940, working completely alone. Not only that, but in that period he moved it 10 miles further than its original location, where he completed it and it still stands, being a museum now.

Now get this: He worked only on nights, completely alone and with a lantern for light. The whole structure is made from more than a 1000 tons of coral rock, while individual pieces weigh up to 35 tons.
Again: He worked alone. No cranes, bulldozers, nothing. When he transported it to Homestead he used a borrowed truck, but no crane to load up the monoliths.
The question is obvious: How the hell did he do it?

The theories are many, as expected. Look them up in this article. The highlights:

One story says that some curious neighbors did see how Leedskalnin moved the stones. They say he placed his hands on the stone to be lifted... and sang. Somehow this levitated the great rocks…

…Alternative science investigators suggest that Leedskalnin somehow learned the secret of the 'world grid,' an invisible pattern of energy lines surrounding the Earth which concentrates points of telluric power where they intersect…

And more… and did anyone ask him how he did it? Well, yes:

"I have discovered the secrets of the pyramids. I have found out how the Egyptians and the ancient builders in Peru, Yucatan, and Asia, with only primitive tools, raised and set in place blocks of stone weighing many tons."

Cool.

Imagine the implications, blah blah blah,  but the same thing always nags at me: Why did he not reveal his secret?

Why does someone who holds a secret that can change the course of mankind, choose not to reveal? Ego? Military implications? Misanthropy?
Or is the secret exactly that? A secret that is not his to share…

And share he did not. He took it to his grave in 1951.

Oh the things that are hidden, the things we have to learn…