No good work before justification: Trent's canon censured
Thesis XXVI. That on the Protestant view no one can do any truly good work before justification is plain from their censure of the Council of Trent's canon 7 of the sixth session: 'If anyone says that all works done before justification, in whatever way they are done, are truly sins or deserve God's hatred, or that the harder anyone strives to dispose himself for grace, the more grievously he sins, let him be anathema.'
They also often praise and approve Augustine's saying: 'Good works follow the one who is justified; they do not go before the one who is to be justified.' This can be seen especially in Calvin's Antidote to the Council of Trent on that canon, and in Chemnitz's Examination of the same council, where he treats of preparation for justification.
Latin
XXVI. Quod vero ante justificationem, ex Protestantium sensu, nemo possit ullum opus vere bonum facere, inde patet quod censura sua notant Canonem illum synodi Tridentinae, qui est septimus sessionis sextae. Si quis dixerit opera omnia, quae ante justificationem fiunt, quacunque ratione facta sint, vere esse peccata, vel odium Dei mereri, aut quanto vehementius quis nititur se disponere ad gratiam, tanto eum gravis peccare, anathema sit. Ac praeterea frequenter laudant & probant quod dicit Augustinus, Bona opera sequi justificatum, non praecedere justificandum. Ut praesertim videre est apud Calvinum in Antidoto Synodi Tridentinae ad Canonem citatum. Et apud Kemnitium in examine ejusdem Synodi, ubi agit de praeparatione ad justificationem.