'Backsliding', 'weakness of, will', ' moral weakness', '"lack of self-restraint', 'lack of self-control'. Do all these have the same meaning ? Is there a philosophical problem here, and if so, what precisely is it? How is an account of what happens in cases to which these terms apply related to the meaning of the words, and to the philosophical problem? These are the questions which I shall try to discuss in this paper.

“Permutatio (i.e. allegoria) est … cum per aliquas dictiones suas res significamus ct tune per illas alias perpendimus, … sicut in parabolis; ‘exiit qui seminat seminare semen suum’ (Luke 8. 5.) verba hie significant res proprie suas, sed per illas alias significamus: per ‘semen’ verbum Dei, per ‘seminatorem’ praedicatorem … et differt a translatione, quia ibi traducitur vocabulum de propria significatione ad aliam rem significandam.” Schol. Rhet. Her.