About Life After Someone Dies

Actually, I do not believe that there is a heaven. I have been believing if a human died, they will birth as another person. However, They might have no memories ex-life even though they birth again. They can be man or woman, but I think to be animal or something else is impossible. If I describe about death, I am going to describe that death is the same with sleep. We can see only a black space when we are sleeping. We will see the black space when we die, and our memories are going to get out of our brain. Then we will be new person with the spirit that he had before, but as I said, the spirit will not have memories. This is my opinion about life after someone dies.