Balance defines the amount of time spent working vs the amount of time devoted to personal pursuits. At some points in your life, you have the time, energy, and desire to spend more of time working. At other times in your life you need to spend more effort on your personal life. This could mean raising kids, taking care of parents, or just spending time enjoying hobbies and past times that are in no way related to work.
Balance is different for everyone. With it, you’re pretty comfortable and happy. Without it, you feel like your life is out of control.
Now I am going to go spend some time with a good book!