Man decides who God decides to regenerate. Man has the ultimate decision. God foresees the faith and thus chooses who to save. But God brings about faith in passive recipients. So God foresees what He is actively going to do.
Man is passive.
But God decides who to choose and give this faith to by foreseeing who decides. God decides to choose them on the basis of their decision. They are passive and God changes them from unbelievers to believers on the basis of their decision. It isn't anything. But it is evident that Harold does not mean that it is nothing.