Sometimes it's best just to do what you should be doing, I suppose.
I've been reading more and more into the whole martial arts thing - its kinship to swimming of all things, is intriguing to me. (Kinship to swimming? Yeah, it's all about the breath you know.)
So much of how one lives one's life is how one physically lives one's r life combined with how one consciously lives one's life.
Nonattachment and non-duality is not all that different from "being like water."
Really, these guys were doing so much of the same thing as the Chan/Zen folks because they came from those folks. Whether or not there was an exact lineage or what-not isn't really the point: they put non-attachment and non-duality in motion; they made it a realized part of life.
And the other bits in one's life are like this.