Why delight is needed: the will moves only toward what delights
Thesis LX. In that author's view this divinely infused delight is needed for every good act of the will because, by Augustine's express statement, the will cannot be moved in any way unless something comes before it that delights and invites the mind. The will embraces nothing unless it is first touched toward it by some sense of delight.
This holds not only for good things but for evil ones too. The will is not carried toward evil unless some prior delight prepares and drives it, through which evil coaxes it under a false show of good.
Latin
LX. Haec vero divinitus infusa delectatio, ex Authoris istius mente, ad bonum quemlibet actum voluntatis ideo necessaria est, quod secundum expressum Augustini pronunciatum, voluntas moveri nullo pacto potest, nisi aliquid occurrat quod delectet atque invitet animum. Nec enim quicquam amplectitur voluntas, quin prius erga illud aliquo delectationis sensu afficiatur. Quod locum habet, non tantum in bonis, sed etiam in malis. Nam voluntas non fertur in malum, nisi praeparetur atque impellatur praecedente quadam delectatione, qua malum sub falsa boni specie ipsi blanditur.