As faith grows or weakens, so the sense of God’s favor and our standing in grace strengthens or fades
Assurance tracks faith’s vigor: as faith grows, confidence of divine favor strengthens; as faith flags, assurance softens.
Latin
XXX. Caeterum, prout fides, vel major, vel minor est; vividior sive languidior: ita quoque sui sensum majorem, vel minorem, acriorem, vel remissiorem animis nostris ingignit. Unde est quod crescente & augescente fide, fiducia illa de Dei erga nos amore & favore, & nostra apud Deum gratia atque justitia, eadem proportione roboratur atque invalescit; & ex adverso minuitur, atque debilitatur, qua ratione fides decrescit atque remittitur.