Nikola Tesla, the pioneering inventor and engineer, famously said, “If you only knew the magnificence of the 3, 6, and 9, you would have the key to the universe.” Though the deeper meaning of this quote remains speculative, many in the world of energy healing and metaphysical science believe Tesla was referring to the foundational nature of vibration, frequency, and energy.

These three numbers,  3, 6, and 9,  appear throughout patterns in mathematics, geometry, and nature. Proponents of Tesla-inspired frequency theory suggest that these numbers represent a universal code of energetic flow. In this context, 3 symbolizes the beginning, 6 the movement, and 9 the completion or spiritual fulfillment.

While Tesla himself did not assign specific healing frequencies to these numbers, the modern frequency healing community often uses 369 Hz or sequences related to 3, 6, and 9 in their sound therapy practices. One such interpretation includes 369 Hz as a balancing tone, used to release emotional blocks and restore inner calm.