But the regenerate cannot fulfil the law perfectly
Thesis XIV. In Scripture's way of speaking, then, those led by God's Spirit may truly and fittingly be said to fulfil God's law and keep his commandments.
Still, they are far from able to fulfil the law perfectly, or to give God's precepts an exact obedience that is complete in every part.
Latin
XIV. Porro, quamvis vero & commodo sensu dici possint qui spiritu Dei aguntur Dei legem implere, & ejus mandata servare, juxta Scripturae stylum & consuetudinem: multum tamen ab eo absunt, ut possint legem perfecte implere, & Dei praeceptis exactam atque omnibus numeris absolutam obedientiam praebere.