The left hand was used for unclean purposes, so a back-hand strike on the opposite cheek would not be performed. Another alternative would be a slap with the open hand as a challenge or to punch the person, but this was seen as a statement of equality. Thus, by turning the other cheek the persecuted was in effect putting an end to the behavior or if the slapping continued the person would lawfully be deemed equal and have to be released as a servant/slave.