How free choice helps or hinders prevenient grace
Thesis CI. For example, the notions of things to be believed, through which, with a supernatural influence added, our mind begins to be enlightened for salvation, can be acquired freely: by listening to preachers, by reading devout books, or in some similar way. Equally, a person can freely turn away from them and so put an obstacle in the way of God's illumination. Even so, those notions get the character of prevenient grace only from God's supernatural influence, not from man's free choice.
The same is true of the devout affections that result naturally and necessarily in the will once God's illumination is given, and that have the character of prevenient grace on the will's side if some special influence of God is added to them. Man's free choice can hinder them, when he freely stops thinking devout thoughts or brings up and looks for reasons that draw the will the other way. It can also help them, when someone of his own accord keeps his mind fixed on that devout thought.
Latin
CI. Exempli gratia, notitiae illae rerum credendarum, quibus accedente quodam influxu supernaturali, mens nostra salutariter illustrari incipit, libere comparari possunt, aurem praebendo concionatoribus, & libros pios evolvendo, aliave simili quapiam ratione: ut & ab eis potest aliquis sese libere avertere, & ita divinae illuminationi obstaculum ponere: Licet notitiae illae rationem gratiae praevenientis obtineant, solum ab influxu Dei supernaturali, non vero a libero hominis arbitrio. Et eodem modo pii illi affectus, qui posita Dei illuminatione, naturaliter & necessario in voluntate resultant, & qui rationem habent gratiae praevenientis, ex parte voluntatis, si peculiaris quidam Dei influxus ad eos accedat, possunt a libero hominis arbitrio impediri, dum homo libere cessat a pia cogitatione, aut adducit & quaerit rationes allicientes voluntatem in partem oppositam; & contra juvari, si quis mentem ultro retineat in pia illa cogitatione.