What is religions?

What is religion? According to an Oxford dictionary, religion is the belief in the existence of a supernatural ruling power, the creator and controller of the universe, who has given to man a spiritual nature which continues to exist after the death of the body. Religion appears to be a simple idea on the surface, but in reality it is a very complex system of ideas that many base their lives upon. There are many religions in the world.
We all live in the world with so many people and so many different religions. We all have friends who have different religions from us. What would you answer to me if I would ask you it is possible to have a relationship with someone who has a different from friend’s relationships, something more close and common? What do you think if people with different religions are getting married? Can someone marry a person from another country or a person who has another religion? Of course he/she can. Nothing was wrong with this. In this century the quest...