What sufficient grace means: one could be saved if willing
They do not mean this grace alone actually converts without further help.
It makes salvation possible — he can be saved if he will.
No ‘physical’ block to salvation.
Salvation is duly offered; mind and will can embrace it if used rightly.
Latin
XIX. Hanc autem gratiam sufficientem vocant, non quod, ex eorum mente, simpliciter sufficiat ad hominem actu convertendum, absque ullo alio auxilio divino: sed quia salutem homini sic possibilem reddit, ut possit salvari, si velit: nec ullum sit, ut loquuntur, Physicum impedimentum quod saluti illius obstet: cum & salus illi debite offeratur, & facultates naturales habeat, mentem, scilicet, atque voluntatem quibus possit illam amplecti, si recte iis utatur.