Vatican Radio used “hard hearted” in their headline, MSW quoted it. Seems odd to me, since Francis organized his talk around “folly.”
 Not hearing the word of God is certainly the focus Francis gives, but I am pretty sure he doesn’t mean “as interpreted by men.” He contrasts those who hear with ideologues, idolaters, and the vain, not with those who disagree with him. It is as much a call to himself as to others, I imagine.
Maybe he should have used “hard hearted” with Matthew’s rejoinder about building on a firm foundation, not sandy soil, perticularly building the Church on a rock. Then we would have known he was talking about himself= Peter.