The meaning of the four senses of Scripture here spoken of; viz., the historical, tropological, allegorical, and anagogical, is well summed up in these lines: Litera, gesta docet; quid credas, allegoria; Moralis, quid agas; quo tendas anagogia. Or, as the lines are sometimes given: Litera scripta docet; quod credas, allegoria; Quod speres, anagoge: quid agas, tropologia. Both Origen and Jerome had spoken of the threefold sense of scripture, referring to the LXX. rendering of Proverbs xxii. 20 (which Cassian quotes below): but in general the Latin Fathers, and the Schoolmen after them, separated the third of Origen’s senses; viz., the spiritual, into two, the allegorical and the anagogical: and so the “fourfold” sense became the established method of interpretation in the West.