Discipline resolves ill feelings . When done thoroughly and lovingly - all ill will is dissolved between parent and child. Discipline is followed by a concrete and genuine demonstration of unconditional love such as cuddling, hugging etc. The bond between the lovingly disciplined child and their parent is strong and sweet. Child Abuse creates hard feelings.
Abusive punishment creates hurt feelings, unresolved resentment, anger and fear.
The punishment is in proportion to the offence. Also, the child has an understanding of beforehand what is expected. Many times the punishment is out of proportion to the offence. The punishment is either too harsh - or the offense is ignored allowing upheaval and anger to grow. Because the parent is inconsistent - the child does not know for sure what the rules nor repercussions are and that is not fair.