Certain fundamentals, true since the beginning of human life, have been glimpsed and hinted at by wise people down the centuries.
This understanding in its current form was first articulated by Sydney Banks in the 1970s and ever since has attracted much attention because of its power to transform lives.
It is known as The Three Principles or Innate Health. It is also referred to as The Inside-Out Understanding.
You can see more in my ebook The Secret of Inspiration
There are many excellent books, including works by Sydney Banks. Video resources can be found on The Three Principles Movies website.