Unequal measure means doubt about a book or dogma can remain among the faithful; Hebrews; Philippians 3
So not everyone in the church receives God’s Spirit in a measure that lets each person acknowledge and discern everything that belongs to God’s Word and sacred Scripture. Among believers who have that Spirit, doubt can remain about some book of Scripture, and about some dogma of the Christian religion.
In the early church not all good and holy teachers held the same view of the canonical books: some rejected what others admitted. For example, the Latin church long rejected the Epistle to the Hebrews, while the Greek church acknowledged its sacred and divine authority.
Nor should someone who errs in a head of religion be struck at once from the number of the faithful. Paul in Philippians 3 wants those who are perfect to bear with those who think otherwise, and to keep fellowship with them as brothers, in the meantime, as God reveals to them what they have not yet reached.
Latin
XIII. Itaque omnes, qui sunt in Ecclesia, Spiritum Dei non ea mensura accipiunt, ut quilibet eorum possit agnoscere atque discernere quicquid ad Dei verbum et Scripturam sacram pertinet. Etenim, inter fideles et Spiritum Dei habentes, potest esse dubitatio de aliquo Scripturae libro, et de aliquo religionis Christianae dogmate. Sic olim in prisca Ecclesia non omnes viri boni et sancti doctores idem senserunt de libris Canonicis: sed quidam rejecerunt, quos alii admiserunt. Nam ex. gr. Epistolam ad Hebraeos diu rejecit Ecclesia Latina, cujus interim sacram et divinam authoritatem agnoscebat Ecclesia Graeca. Neque qui errat in aliquo Religionis capite, statim est e numero fidelium expungendus. Nam Paulus Phil. 3. vult ut qui perfecti sunt ferant aliter sentientes, et tanquam cum fratribus communionem colant, interim dum Deus ipsis revelet illud, ad quod nondum pervenerunt.