Live people in the other world

The live people in the other world are invisible for its inhabitants as well as spirits in the world of live people. And live people bring the same harm as dead people to the live people in their world.
In other countries of the world, live people are welcomed in the other world and the dead relatives receive them well. Some people even go to the other world with some purposes. For example, Orpheus went to take his wife Evridika back in Greek mythology. By the way the plot of the story about Orpheus and Evridika is rather popular in many countries of the world. For example, the same myth had the North-American Indians and Japanese people.
But the presence of live people in the other world was always the break of rule, the exception from the rule and it could even have serious consequences.
Sometimes the picture of the other world is described in dark tones. The sun is not shinning brightly here; there is no need there, no joy. These are ideas of the Greece and Siberian mythology where souls existed in the darkness without any senses. Egyptians and other nationalities of Africa described the other world as something good and great. For example, they believed that it had rich hunting areas, fertile lands, and a lot of domestic animals. They believed that dead people become young and never suffer from diseases and troubles. They always dance and are entertaining themselves.
So, in fact every country described the other world on its own as well as the place of live creatures.