"The expansion of space, time, sound and energy continue in the process of creation, and primary triangle is transformed into a series of lines, triangles, circles and squares to form the Sri Yantra. The various patterns are the modifications of the original primal vibration, which at each stage contains interplay of the static and kinetic energies in varying degrees of concentration. The Sri Yantra is called “Nava Chakra”, since it is composed of nine circuits, counting from the outer plane to the bindu. Through contemplation on the Sri Yantra, the adept can rediscover his primordial source."
January 1, 1970
https://en.wikiquote.org/wiki/Yantra