Teslas three-part relativity
“If you only knew the magnificence of the 3, 6 and 9, then you'd have the key to the universe" - Nikola Tesla (Sep 1899)
Some suggest that later in his life he became an obsessive compulsive and he had to have everything in threes or divisible by three. e.g. 3 stacks of 3 napkins on his table to eat. etc and he would only stay in a hotel room that was divisible by 3, 6 or 9 etc
Tripartite Essentialism, a grand unifying theory by Andrew Hennessey, 1991 is based on a system of three, six and nine part ‘logical atoms’ (Russell) whose activity models absolutely every transaction in the universe.