Man and Sin by Piet Schoonenberg (1964) 2.3 EV

[The faculty of reason solved practical problems.

The same faculty of reason allowed the possibility to escape slavery to the material world.

Reason could learn (recognize) the secret knowledge (gnosis) that would liberate the spirit from its material impediments.

Reason could learn the incantations to recite after death, when the spirit migrated back to the source.]