Holy Rus refers to the idea that Russia is a special and sacred country because of its connection to the Eastern Orthodox Church. The term "rus" comes from the ancient name of the East Slavic people who lived in what is now modern-day Russia, Ukraine, and Belarus.
So imagine you are playing with your toys and you have a special toy that you love the most. That toy is really important to you and it makes you feel happy and safe. Well, some people think that Russia is like that special toy for them. They believe that Russia is the most important country in the world because it has a special connection to their religion, the Eastern Orthodox Church.
The people who believe in Holy Rus think that this special connection goes back to the very beginning of Russia's history. They think that their ancestors, the Rus people, were chosen by God to create a special country that would be a shining example of true faith and goodness. They also believe that the land itself is special, and that it has a special power and magic that can protect and heal them.
So in short, Holy Rus is an idea that Russians have that their country is very special because of its connection to their religion and their history. It makes them feel proud and strong, like they are part of something bigger and more important than just themselves.