I’m reading one of the oldest commentaries on the _I Ching_ (_Shuo Kua_) and am amazed at the genius of the Sequence of Earlier Heaven. I would have never thought to start a system of numbers using two and three as the starting point. This makes sense though. Two gives opposition, three growth.
I prefer the [trigrams](https://ichingfastale.blogspot.com/2015/05/el-i-ching-o-libro-de-los-cambios.html) to the hexagrams, as they are more fundamental. No trigram has balance within itself–considered in itself, each leans toward yin or yang. Only when taken with its counterpart is balance achieved.