Why do Christians like Rules?

I just heard this quote from Josh McDowell while listening to Focus on the Family:

Rules without Relationship leads to Rebellion

That's great. I have to remember that both as a Christian and especially as a parent. It's not "Spare the rod, spoil the child". That's a trite saying we use to justify our discipline methods. The actual verse is

He who spares the rod hates his son, but he who loves him is careful to discipline him. (Proverbs 13:24)

Have to remember that too.