I find this passage from Song of Myself by Walt Whitman to be so very connected to the beautiful non-dualty of the great Zen mystics. Dōgen wrote at length about the intimacy that arises when the separation between the self and other fall away.
Whitman wrote this:
Stop this day and night with me and you shall possess the origin of
all poems,
You shall possess the good of the earth and sun, (there are millions
of suns left,)
You shall no longer take things at second or third hand, nor look through
the eyes of the dead, nor feed on the spectres in books,
You shall not look through my eyes either, nor take things from me,
You shall listen to all sides and filter them from your self.
Likewise, Dōgen wrote that: ”To hear sound with the whole body and mind, to see form with the whole body and mind, one understands them intimately.” This is the essence of Zen. It’s also as ordinary as taking a breath, walking, eating. It is this very life, this very moment.
Simple. Beautiful.