Directed by whose will? A determinist would claim it's the particular physical arrangement of the individual's rational machinery that provided the apparent function of will. The Calvinist would claim it was god's will. A person who believes in free will would claim that the will must be the individual's will. Will though is a rather imprecise, arbitrary and thus useless term, when describing how decisions and actions are caused.
I’ll complain about your complaint (!) about “will” because he goes into what will- is elsewhere — at length, believe me.
I think he means the believer’s will. But he would say that faith in Christ is impossible w/o grace. Faith is a “theological virtue’ in his scheme, and they’re impossible w/o grace.