Need to write a second reply. This system allows too few words :)

As for the Greek "authentein", it has been debated and studied a lot. Most of the recent Greek lexicographical works are united in saying it means "dominate". That is how it is used in the first-century Greek, which was used by the biblical authors. The word appears only once in the NT, in the Pauline passage. It is NOT the normal word for power or authority. I stand with what I wrote about it.