What is the secret in Think and Grow Rich

I had been wondering about the "money making secret", too, when I got my hands on Earl Nightingale's book "Greatest Discovery, The Strangest Secret Revisited".

In it, Nightingale, says on pages 5 and 6:

"My reading and search for the secret of success continued without letup. ..."

"While reading, it dawned on me that I had been reading the same truth over and over again for many years. ..."

"The astonishing truth [is] that WE BECOME WHAT WE THINK ABOUT. ..."

"Those six simple words, in that order, revolutionized my life. I had found them, clearly spelled out, just as I had so desperately hoped as a child of twelve to find them, not in some hoary, ancient tome, but in a book published in 1937 entitled Think and Grow Rich by a man named Napoleon Hill."

[End of quote]

So, Nightingale's "version" of the secret is WE BECOME WHAT WE THINK ABOUT. In reading over the "Greatest Discovery" again, I find so many principles spelled out there that originate from Hill that I'd almost call it plagiarism. I must admit, however, that Nightingale is an incomparably better writer than Hill.

So what do you think of WE BECOME WHAT WE THINK ABOUT?

Cheers,

Wolfgang