I Desire Mercy and Not Sacrifice

In Hosea 6, 6, Jesus quoted and told the Pharisees who were scandalized that he was eating with sinners and tax collectors. He said, go and learn what this means. I desire mercy and not sacrifice. Well, by the time we get to chapter 12, Jesus says, because you did not learn about God's mercy, they then attribute the spirit of mercy to the devil. And so now their hearts have become hardened in this particular way.