As I see it, there are three pillars of the Kemetic religion(s), in all its (or their) many forms. These pillars are: The gods, the practices, and the concept of ma'at. It is this third, ma'at, that I will be discussing in this particular post.
Ma'at is often translated as Truth, Justice, Good, Order, or Cosmic Order. It is all of those things at once, in a way that can't be adequately conveyed with any one of the above English words or phrases. For the Egyptians, the stability of the cosmos was not a fundamentally different thing from a king ruling justly. They were both manifestations of ma'at, and the lack thereof (an unstable cosmos, an unjust king, with the resulting disorder in the land) would be considered a lack of ma'at, and signs of its opposite, isfet (often translated as "evil" or "disorder".)
The gods are said to live on ma'at as we live on food. I would stretch this bit of theology farther, based on a couple of points: