Jesus offers up examples of the priest and the Levite -- among the keepers of righteousness of his day. It is not that the priest and the Levite are mean people for passing by on the other side of the road. What they are doing as good ethical people is quite natural: They have responsibilities, obligations, and rituals to uphold. The man was left for dead -- touching a potentially dead body or even the blood of the injured would have likely rendered any priest or Levite ritually unclean and unable to attend to their socially sanctioned duties for a time. So busy were they in attending to their good, ethical righteous tasks that they had no time to stop for an errand of mercy.