The difficulty: living faith and some love of God precede justification
Thesis XXVII. On this point, however, Protestant doctrine does not seem free from difficulty. Those among them who reason most exactly about theological matters acknowledge that faith, and a living and active faith, is a prerequisite condition of a man's justification.
Yet believing in God is a truly good work, and living faith does not exist without some love of God, which is itself a good work too. So some works that precede justification are truly good.
Latin
XXVII. Hac autem in parte videtur doctrina Protestantium non carere difficultate. Et enim qui inter eos de rebus Theologicis accuratius Philosophantur, agnoscunt fidem, eamque vivam & actuosam, esse conditionem ad justificationem hominis praerequisitam. Jam vero credere in Deum est quoddam opus vere bonum, neque fides viva est sine aliqua Dei dilectione, quae ipsa quoque est quoddam bonum opus; adeoque opera quaedam quae justificationem praecedunt, sunt vere bona.