Zero is a misconception, zero became and is a conflict of a misunderstanding, like the word "nothing". Nothing is an impossibility similar to zero.
3 = a sacred set, 6 = two sacred sets and 9 = three sacred sets.
3 is a self balancing entity, 6 has no balance, it opposes itself and 9 is balanced by inclusion of all and is complete.
Zero, like "nothing" is a misguided concept and is inaccurate.