じ/ず conversion in 人は動かじ


There is this famous quote reputedly from 山本五十六:

> やってみせて、言って聞かせて、やらせてみて、
> ほめてやらねば人は動かじ。([source](https://dictionary.goo.ne.jp/quote/154/))  
>  やってみせ、言ってきかせて、させてみて、誉めてやらねば人は動かじ。(a different version.
> [source](https://www.komcon.co.jp/ml/1166/))  
>  Do it and show'em; say things and make'em listen; try and let'em do things;
> and if you don't praise people (for what they do), people don't lift a
> finger. (My rendering)

It appears 動かじ = 動かず, but I can't find anything on [Wikipedia's 四つ仮名
page](https://ja.wikipedia.org/wiki/%E5%9B%9B%E3%81%A4%E4%BB%AE%E5%90%8D)
about this conversion. Is this a marker of [Early Modern
Japanese](https://en.wikipedia.org/wiki/Early_Modern_Japanese) or a dialect?




[じ(まじ)](https://www.google.com/search?q=%E3%81%98%20%E3%81%BE%E3%81%98) is an
auxiliary verb that means _will not_ (as opposed to ず meaning _not_ ). So 動かじ
means _(People) will not move/take actions_.




[じ(まじ)](https://www.google.com/search?q=%E3%81%98%20%E3%81%BE%E3%81%98) is an
auxiliary verb that means _will not_ (as opposed to ず meaning _not_ ). So 動かじ
means _(People) will not move/take actions_.

