User blog comment:ImperiexSeed/Supernatural Mysteries/@comment-3481504-20120312215145/@comment-3045936-20120313014309

All they said was just another reality. Just supernatural beings like Angels are left powerless because its the law of that reality. But the except is without help another being can be sent there or taken from. Like with Sam and Dean they had to find the keys to open the door which were parts of the ritual. But another being is needed to open the door or portal on there side too and pull them out.