one another day after day, as long as it is still called “Today,” lest any one of you be hardened by the deceitfulness of sin. (Hebrews 3:12–13) Hard Hearts I’m sure all of us have met people with hard hearts. We have a whole world of people today with hard hearts. When I hear the way people talk to one another and how often they say, “I don’t care,” those are expressions of a heart that is not sensitive anymore, that has become calloused. How do we get a hard heart? According to the writer of Hebrews,