Heptaparaparshinokh, Triamazikamno and Reciprocal Maintenance

Gurdjieff said that not all enneagrams have a triangle - those that do not require interaction with other enneagrams at the "shock points" 3, 6 and 9. This necessity of "borrowing" the momentum, energy or output of another process to advance to the next stage is the Enneagram representation of Ashiata Shiemash: "I eat and am eaten," or in the Buddhist formulation "Through the arising of that, this comes into being; through the cessation of that, this ceases to be."
 
Another way of saying this is the Tibetan/Navajo formulation in which the imperfection of all things is a prerequisite for their existence. If not for the incompleteness of all things, there would be no cosmos, no evolution and involution, only a silent Universe of solitary spinning spheres. According to Gurdjieff, the "merciless Heropass" (Time) would eventually cause these perfectly complete Enneagrams to stop spinning, and from this death there would be no rebirth.
On the level of personal experience ths means that there are moments in our lives when we need to open ourselves to  the opportunity for an exchange with another person or group of people on economic, social, intellectual, sexual and other levels.