Shitou Xiqian
... that Shitou Xiqian was an obscure Zen teacher during his life but is now considered one of the two ancestors of all existing branches of Zen?
... that <b id="mwDFg"><a href="./Shitou_Xiqian" id="mwDFk" rel="mw:WikiLink" title="Shitou Xiqian">Shitou Xiqian</a></b> was an obscure <a href="./Zen" id="mwDFo" rel="mw:WikiLink" title="Zen">Zen</a> teacher during his life but is now considered one of the two ancestors of all existing branches of Zen?