When we speak of an essence as receiving existence, we do not necessarily imply a real distinction between receiver and received: “Non est imaginandum quod una res sit, quae participat sicut essentia, et alia quae participatur sicut esse, sed quia una et eadem res est realitas modo participato et per vim alterius sicut per vim agentis: haec enim realitas de se non est nisi sub modo possibili; quod autem sit et vocari possit actus, hoc habet per vim agentis.” —
— from Ontology, or the Theory of Being by P. (Peter) Coffey

As Bech points out, Chaucer here copies the remark in Dares:—'Demonstrare cos qui cum Iasone profecti sunt non uidetur nostrum esse: sed qui uolunt eos cognoscere, Argonautas legant.
— from Chaucer's Works, Volume 3 (of 7) — The House of Fame; The Legend of Good Women; The Treatise on the Astrolabe; The Sources of the Canterbury Tales by Geoffrey Chaucer