It appears that early 19th Century 'New Thought' aka 'Higher Thought' is a major source for Napoleon Hill's 'Think and Grow Rich', the Law of Attraction, The Secret, and anything or anyone who teaches that we can 'manifest' what we desire through focused will.
Why You Should Know About the New Thought Movement
[theconversation.com]
'
Why You Should Know About the New Thought Movement
[theconversation.com]
'