The heavenly delight is an indeliberate act sent from heaven
Thesis LVIII. With these points in view, the same doctor observes that the heavenly delight in which he places Christ's efficacious aid, needed for every devout action and good act of the will, is not delight in the proper sense, by which the will rests in a present good and enjoys it and which is the end point of the desire by which the will is carried toward the good. Nor is it any free and deliberate movement of the will.
It is an indeliberate act sent into the will from heaven, through which the good put before the will either simply pleases it sweetly or even stirs it to desire that good. Although the will does not elicit this heaven-sent act freely, the act still proceeds from the will actively and is a vital movement of the will.
Latin
LVIII. Quibus animadversis, observat idem Doctor coelestem delectationem, in qua ponit Christi auxilium efficax, ad omnem piam operationem & bonum voluntatis actum, necessarium, non esse delectationem illam proprie dictam, per quam voluntas in bono praesenti acquiescit, & eo fruitur; & quae est desiderii, quo voluntas fertur in bonum, quasi terminus: nec etiam ullum esse voluntatis motum liberum atque deliberatum; Sed actum quendam indeliberatum coelitus immissum in voluntatem, & per quem, vel ei bonum propositum suaviter tantum placet, vel etiam in bonum appetendum commovetur. Qui actus coelitus immissus, licet voluntas eum libere non eliciat, ab ea tamen active procedit, & vitalis est illius quidam motus.