Love of God and reference to his glory need the grace of Christ
Thesis XVII. To love God above all things and to refer one's actions to his glory belongs above all to the spiritual worship of God and to godliness. It follows that the saving grace of Jesus Christ must certainly be wholly necessary for it, since without that grace, as the whole Roman School admits, the free choice of fallen man can do nothing at all toward willing and doing spiritual good.
From all this the Protestants rightly conclude that a man without the grace of Christ, in the bare state of fallen nature, can do nothing that has the true character of moral good and is held truly just and upright before God. Men left wholly to themselves both miss the true end in what they do and act from a bad principle, namely love of self.
Latin
XVII. Jam vero Deum supra omnia diligere, & actiones suas ad ejus gloriam referre, res est quae ad Dei spiritualem cultum & pietatem maxime pertinet. Et ex consequenti certum esse debet ad hoc omnino necessariam esse salutiferam Jesu Christi gratiam, sine qua, fatente tota Schola Romana, nihil valet prorsus liberum hominis lapsi arbitrium ad spirituale bonum volendum & perficiendum. Ex quibus omnibus merito concludunt Protestantes hominem Christi gratia destitutum, & in simplici lapsae naturae statu, nihil facere posse quod boni moralis veram rationem obtineat, & apud Deum vere justum atque honestum habeatur: Quandoquidem homines sibi prorsus relicti, & a vero fine in agendo aberrant, & ex malo principio, amore scilicet proprio, operantur.