By the time Jorge Luis Borges sat down to write about Basilides in 1932, the Basilideans had been extinct for well over a millennium, remembered mainly through the hostile summaries of the churchmen who had opposed them. Borges did something almost nobody else had bothered to do: he took their cosmology seriously as an intellectual structure, on its own terms, rather than as a heresy to be catalogued and dismissed.
The essay, "Una vindicacion del falso Basilides," lays out the system as the heresiologists reported it: a hierarchy of emanations, the mysterious Ogdoad, the God of the Jews demoted to one lesser power among many. Borges treats this not as nonsense but as an "ardent speculation," the work, he writes elsewhere in the same collection, of "desperate and admirable men." He ends with a thought experiment that is really the whole point of the piece: had history gone the other way, had Alexandria's intellectual culture triumphed over Rome's institutional one, the strange and tangled stories he has just retold "would be coherent, majestic, and perfectly ordinary."
That is not the voice of a Basilidean, and Borges was not reconstructing lost scripture. It is a twentieth century literary imagination taking a suppressed ancient system seriously enough to ask what the world would look like if it had won. The essay has been translated into English twice, under two different titles, and its themes echo elsewhere across Borges's fiction, evidence less of an isolated curiosity than of a system that kept pulling him back.