Man and Sin by Piet Schoonenberg (1964) 2.3 EY

Summary of text [comment] page 82

[The prior interscopes also suggest this: The Manichean solution arrived after the stoical common folk interscope turned into an intersection.

Speculative reason resolved the intersection.

Thus, the speculative reason of the Manichean was born through detachment from the practical reason of stoical common folk.]