Ecclesiastes 8:11 Because sentence against an evil work is not executed speedily, therefore the heart of the sons of men is fully set in them to do evil.
When sin goes unpunished for a long time men set their hearts to do evil. They is why the punishment should fit the crime and be carried out quickly.
This is a verse that will help you as you discipline your children. They need to know that disobedience has consequences and should see that soon after their disobedience.
This helps in our personal lives also. If we do not see God deal with us in our sin we tend to get used to it and continue on in it. This will lead to a need for God to deal even more harshly.
Rebellion will always be dealt with. We know that so we should be careful not to live in that attitude or state of mind!