When AddDJP has "as fer forth as y knowe" instead of "as ferforth
as Ifeele" (Bazire-Colledge 220/27) in a comment on the necessity of saying the prayers of the office attentively, this may not be the better reading to be followed by "and as I haue lierned"--logically it makes more sense for a feeling to be confirmed by what one has learnt.
And seyde, 'What amounteth al this fare?' Custance answerde, 'Sire, it is Cristes myght, That helpeth folk out of the feendes snare.' And so ferforth
she gan oure lay declare That she the constable, er that it was eve Converteth, and on Crist made hym bileve.
Chaucer also prefaces Prudence's first attempt to get Melibee to stop crying by adding that she does so "as ferforth
as she dorste" (VII.
Through the word "unwemmed" (unstained, unadulterated), Saint Cecile is associated with the Virgin Mary, who "nobledest so ferforth
oure nature" and purified the "contagioun" of the nun's body (137, 47, 40).