Both as a responsible parent and as a Jew, I want to be consistent with my children. As a parent, in order to teach them that the rules are the rules and give them a sense of predictability to rely on. As a Jew, in order that they have respect for me and my rules and don't see their father, who is their model of relationship with Hashem, as being arbitrary.
However, at the same time, I want them to learn that there is such a thing as forgiveness and rectification. I want them to know and see that they can fix what they have done wrong.
I understand that this is not a contradiction, and someone mature will understand that you are not supposed to break the rules, but if you do and you regret it you can make up for it. However, my children (and I assume most normal children) assume that if they will always get a second chance, then there is no need to worry about the first chance.
Is there a way to be consistent and steadfast to the rules, but still teach a child that he can make up for his mistakes? And if not, what takes precedence?