This is a schematic overview of the so-called Subtle System of a human being consisting of three engergy channels (Nadis) and seven energy centers (Chakras). The seven Keys of Wisdom represent these seven Chakras.
The knowledge about that was gathered over thousands of years especially in India, further-developed and transmitted to other countries.
In different, however very much encrypted forms, the knowledge appeared also in the West. The so-called Tree of Life and also the Sephiroths of the Caballistic Life Tree can be seen as at least hints to it.
This means, the knowledge about the Subtle System is new not really. However, it finds out an actualisation and a reassesment through the teachings of Sahaja Yoga.
The international Sahaja Yoga Homepage in detail describes the Subtle System and the process of Self-Realization. However, you also can experience your Self-Realization here.