The disciple is not above his master: but every one that is perfect shall be as his master.
Jah is always the head, you can't be One with Jah if Jah is not the head, I and I must go to Jah to join with Jah. Here is a reasoning I put up before about Oneness with Jah.
If I look at the ocean from Africa, Asia, North America, Europe or anywhere else, I see that same one body of water. So I see Christ as Jah, I see Haile Selassie I as Jah, and I see all that live by the way of Jah as Jah. But when I see Jah, I only see One, not two, three or any other number, only One.
When a drop of water goes into the Ocean, it doesn't become leader of all the drops that joined with the ocean. It is no longer a drop, but is the Ocean, and is head of itself.
Here is another reasoning about Oneness in reference to RasTafarI
Who is RasTafarI?
Haile Selassie I