Why is it dangerous to have a hardened heart toward others?

A hardened heart, as described in Mark 3:1-6, leads to an inability to empathize with others, as was evident with the Pharisees, who could not help but look for ways to accuse Jesus rather than serve others. This attitude of self-righteousness produces a lack of love and can drive a wedge between believers and the grace of God. The danger of having a hard heart lies in its capacity to justify unloving behavior under the guise of religion. When our hearts are hardened, we lose sight of the compassion that ought to characterize our lives as followers of Christ, who came to save and restore, not condemn.