You would hit a very comfortable point in your life if you never had to change, right? If everything was just as you wanted it to be and there were guarantees that none of that would change, then you would likely accept that stasis. However, such a scenario doesn't exist. Life is always changing. Circumstances are always changing. And as a result, we have to adapt and change as well.
Now why are we talking about this on a family law blog? Well, change is inherent to the idea of divorce. You're changing your life from living together as a couple to being apart and living independently. But there's another reason this idea of change and divorce is important: for the sake of your divorce agreement or your child custody arrangement, you have to be prepared for those agreement to change and evolve over time. They are extremely unlikely to remain the same over the years.