Assisting grace on the first view: a partial cause, not prior in nature
Thesis XXXV. Assisting grace, in the opinion of the same doctors, consists chiefly in a gift and help of the supernatural order by which the will is lifted up and helped to produce acts beyond its natural strength.
This help moves the will physically and effectively. Yet it does not concur in the supernatural work before free choice in the order of nature, and with regard to the supernatural act it is not, strictly, the total cause but only a partial one.
Latin
XXXV. Gratia vero adjuvans, ex eorundem Doctorum sententia, praecipue consistit in dono & auxilio quodam ordinis supernaturalis, quo voluntas elevatur, & juvatur ad eliciendos actus, qui naturales ejus vires superant. Quod auxilium voluntatem movet physice atque effective: sed tamen non concurrit ad opus supernaturale prius natura, quam liberum arbitrium: neque se habet proprie, ut causa totalis, respectu actus supernaturalis, sed ut causa partialis duntaxat.