Well then...likely we can blame it on Google Translate. Still, here is the original text, if it helps frame it definitively
Is this indeed a reference to Hajime?
I'm afraid we're going to need a lot more context. The sentence provided, as is, simply says "Shisei (posture) was the word that expressed the one-dimensionality of the body and mind." I have no idea how that's supposed to relate to "hajime", or even what it's supposed to mean.
Japanese is a high context language, so the more context you provide the easier it is to provide a translation, and the better the translation will be.