The testimony of Ames
Thesis XXXI. William Ames says much the same in Bellarminus enervatus, volume 4, book 6, chapter 7: 'We do not teach that the law is simply impossible for man: for Adam, say, before the fall, and afterwards for Christ, or for those perfectly sanctified in Christ. But of others, whose sanctification is only begun under the ordinary dispensation of grace in this life, we say that they cannot keep the divine law perfectly and exactly.'
Later, replying to Bellarmine's arguments, he grants that the saints praised in Scripture kept the commandments in purpose and effort, though not completely in effect; in essence, not in completion; in the quality of sincerity, not in the quantity of intensity or extent.
Latin
XXXI. Similia tradit Guilielmus Amesius in Bellarmino enervato tom. 4. lib. 6. c. 7. Nos, inquit, non docemus legem esse plane impossibilem homini, Adamo puta, ante lapsum, & postea Christo: necnon iis qui in Christo perfecte sanctificantur, sed de aliis, qui inchoatam tantum sanctificationem habent, ex ordinaria gratiae in ista vita dispensatione, ut legem divinam perfecte & exacte observent, nos dicimus hoc fieri non posse. Et postea, Respondens ad argumenta Bellarmini, concedit sanctos, qui in scriptura laudantur, observasse mandata proposito & conatu, non omnimodo effectu: quoad essentiam, non quoad complementum: quoad qualitatem sinceritatis, non quoad quantitatem intensionis, vel extensionis.