Although no parent can or should expect to be perfectly consistent, some level of consistency is needed for a child to learn the lessons of social life and feel secure while doing so.
Children learn appropriate behavior easier when learning conditions remain constant.
Parents should consider at least four aspects of consistent discipline. Consistency from Situation to Situation Results are predictable. Your predictable and consistent behavior gives children a sense of security. They need not spend all their energy figuring out what parents are going to do next. If rules are consistent, results of disobeying them will be predictable.