Is it Better to Heal or Destroy? (Mark 2:23-3:4)

Humanity has a funny way of conducting justice.  We want justice, and want to see things done correctly.   The reason why this is funny is because we want other people to do the right thing while missing our particular infractions.  This is the crux of Christ’s question: is it better to heal or destroy?  In other words if you are going to do an infraction would you want this to be done erring on the side of grace or contradicting justice?