This theory that originates from Gurdjieff and Ouspensky (and has roots in the Pythagorean theories of harmonics) says that every process is formed of seven stages of development and that there are two discontinuity points that need an energy boost or a shock to continue.
Those seven stages were symbolically associated to the musical octave from "do" to the next "do".
On an octave, the first shock is to be delivered between "si" and "do", that is, at the end of one cycle and the beginning of the next one.
As the energy of the beginning may run out quite quickly and the process might not be completed, a second shock is to be delivered between "mi" and "fa", which is 3/7 of the whole cycle.
If you think about the 7 musical tones in association with the 7 chakras of the energetic body, you will notice that there is something special between the 3rd chakra (solar plexus chakra) and the 4th chakra (heart chakra), as there is indeed a wall, a separation. On the physical level this wall is the diaphragm, that separates the abdominal cavity from the thoracic cavity – the first 3 chakras are located below the diaphragm, the next 4 chakras are located above it. On the spiritual level, there is a separation between working to fulfill one's basic needs (first 3 chakras: food/money, sex/social acceptance and trust/personal power) and working to fulfill one's spiritual needs (love, sensibility/intuition, knowledge/understanding, bliss).
Using this knowledge and applying it back to the moment of the second shock (3/7 of any cycle), one can understand that the second shock should be spiritual in nature and is essential for an integrated living, for the unity between the material and spiritual sides of our beings or of any life experience. (Astrology Weekly)
