If they can't repeat it, they didn't get it.
Mistakes are the doorway to discovery.
Occasional kindness does not cancel out cruelty. Hitting is never acceptable under any circumstances.
Anyone who consistently makes you feel bad is not helping you get better.
Bullies are masters at holding others responsible for their misbehavior. Instead of claiming "the devil made me do it", they argue "You made me do it".
There is nothing wrong with people that reasoning with them won't aggravate!