Sometimes a see Borges as a time machine and I think he travels as Nils Runeberg in this case. Borges is the heresiarch; he reveals with elegant logic the fragility of fixed ideas and historical interpretation of literary texts. And of course, how easily these can be manipulated and created as he proves in his five page experiment. This suggests that each person is a single "god" but also creators of gods.
From the Borges Dictionary I copy: "Runes were the characters of an early alphabet current in parts of northern Europe (Scandinavia in particular). The word is often used now to describe something secret and mysterious. Lab. 152 (122): the crosses which Borges defines as 'runic' are in fact wheeled crosses, the result of the fusion of Viking culture with Celtic Christianity. The wheel was a prominent symbol in early Norse mythology, where it represented the sun". Lab. 153 (122) Aleph 39, Brodie 98 (117) Brodie 148
Borges mentions for example in The Theologians: "En las montañas, la Rueda y la Serpiente habían desplazado a la Cruz". I just have the spanish version, excuse me Jorge Luis for my translation: "In the mountains, the Wheel and the Serpent had displaced the Cross".
I suspect Borges writes about the conflict between opposites, the war of the symbols, between primordial forms which in great deal define reality, thus, identities. He is, disguised as Nils Runeberg, a mountain, a circle, a cross and nothing. But still fighting.
Am I on track?