 The parerga thus are used by Kant to separate out what doctrines of historical faith the pure rational system of religion can assess versus what doctrines that—while we are compelled to speculate about them—require our agnosticism. As such, the parerga reflect limit issues, at the “border” of rational religion, for which there is both a theoretical interest and moral need to visit, but also where the dangers that we stray into dogmatism are the greatest (Palmquist 2016, Muchnik 2019).