Think and Grow Rich is arguably one of the most influential self-help and personal achievement books ever written. Its central thesis is that our thoughts are incredibly powerful and are the primary determinants of our success or failure in any endeavor, including accumulating wealth. Hill argues that achieving riches (and other forms of success) starts with a specific mindset, a burning desire, and the application of certain principles he distilled from studying the lives of highly successful individuals of his time, most notably Andrew Carnegie. The book emphasizes that wealth is attracted to those who are mentally prepared to receive it.