The word translated "because" is a preposition in Greek, namely
dia.
This preposition refers to the channel of the act, or the means
by which some "thing" is accomplished. It is therefore often translated as "by" in the KJV, and when this is the case, "by" typically means "through".
In any language, prepositions are designed to help predicate the meaning of the nouns and noun phrases surrounding it. To predicate meaning is "to preach" (In Latin:
predicare) the meaning, or to help make sense of what the sentence is about.
So what does
dia, in this instance, "preach" to us?
First, before I answer, let me say that I believe Paul's use of the word "angels" or
aggelous refers to actual, heavenly angels, and not simply human "messengers". I also don't think Paul is making any reference to so-called "fallen" angels.
Now then, to answer the question.
Dia here means on the account of, or for the sake of. So, why would a woman need to have power or
exousia on her head or
kephale?
Well, what is power/
exousia and what does Paul mean by saying this power/
exousia needs to be on her "head" or
kephale?
Exousia refers not just to power in the sense of might or ability to do some "thing", it also expresses the right and authority to exercise that might in order to be able to do that "thing".
So, that's what is supposed to be on a woman's "head" or
kephale. And, in verse 9, Paul's shows clearly that the reason this power/
exousia is supposed to be upon her head or
kephale is because, Adam was not created for Eve, but rather Eve was created for Adam, and on down the list, of every man and woman created by God.
This being the case, head or
kephale, from the phrase "power on her head because of the angels" can in no way be referring to her actual head, as in her noggin, but rather, to her husband as head/
kephale over the woman.
Now, note. I underlined "over" on purpose. Here's why:
The "on" from "power on her head" is the Greek preposition
epi, and it means "on, over, or above". So, this power or
exousia is supposed to not just be "on" her head/
kephale in the way we sit on a chair, but rather, this power/
exousia is supposed to be over and above her head, because of the angels.
So what power/
exousia is supposed to be over and above her husband?
Paul tells us. It's Christ, the head of every man. Christ sits at the right hand of the Father, in His Father's throne. He is surrounded by an innumerable host of angels, including the four living beings or cherubim, as described in Ezekiel and Revelation.
When a woman has long hair, she shows submission to her husband as her "head" or
kephale by honoring her husband's "head" or
kephale which is Jesus. These angels surrounding Him on His Father's throne belong to Him and are His to command.
By honoring the Lord with long hair, she is honoring the angels that minister before the Lord, and sing His adoration on down through the ages. In
Isaiah 6, for example, we read of angels that veil their heads with two of their wings, as they fly through the heavenly temple crying "Holy, Holy, Holy, Is The Lord God Almighty...".
So that's why a woman ought to have power on her head because of the angels. It speaks to her submission and place of helper underneath her husband's authority over her, and to Jesus Christ, her husband's and authority's head and authority.
The woman is not to stand out. She is to be modest, even shame-faced. In the church, she is to keep silence and defer any questions or misunderstandings to her husband's counsel and wisdom. She keeps and guides the house. I'm sure you know and believe these verses. But what of the man? He is to remain uncovered, because he's the image and glory of God. It is his job to reflect to the world the divine order of things. He does so symbolically by keeping his hair short.
In the ancient world, it was the men, and not the women, who sat in the gates. Look, for example, to
Proverbs 31. The woman hustles and bustles about to keep her home in order, and if she does so, she will have praise in the gates. Why? Because that's where her husband sits with the other men, and there, he can brag on his wife to the other men, and the other men can see how blessed he is to have such a wife.
It is the established order, specifically designed by God, maintained in the world by all who fear God, and it will never change. Men and women are not equals, apart from salvation. Men have God-given abilities and responsibilities that far outweigh those of a woman's. Men are typically stronger in body. They are typically taller, faster, more durable, need a higher in-take of calories, and on the list it goes.
In
Deuteronomy 22:5, a famous and infamous passage of Scripture (but tangentially related to this topic), the items which pertain to a man that that verse is talking about, isn't about simply clothing. It's about "gear" or an apparatus, typically translated elsewhere as "armor", but also sometimes translated as "tool" and "weapon".
The point is, men have roles in the public and private life in the world that women don't have, and that's okay. It's the same for woman, both in public and in private. That's okay, too. Well, one of the roles that God gives to a woman is to be in subjection to her husband, and not only to him, but also to Him, that is, her husband's "head", even Jesus of Nazareth.
Angels are all around us, and are with us wherever we go, and in whatever we do, as long as it's Godly. They are given as ministers to the heirs of salvation, but they are not ours to control. They belong to Jesus. And as agents of His holiness, reflecting His glory and splendor, when they are involved in the church, when the saints meet and pray and prophesy, they are to be respected and honored. When saints meet and everything is in proper order, when spiritual decorum is maintained, and the head of every man is honored and respected, the angels present in that meeting are allowed to freely participate under Christ's guidance and command.
But when things are disordered, hectic, chaotic, divisive, when men and women are disobedient to the Lord they profess to love and serve, when they get together, Christ isn't honored and respected, no matter how much they may otherwise claim, and in this way, Christ's angels are restricted from participating, until flesh is crucified, humility and repentance are sought, and a renewing of the otherwise carnal mind is achieved.
Therefore, the woman's long hair doesn't give her any power or authority at all. Instead, or rather, it is a token of her submission (that is, her very
lack of power or authority), to her husband and her husband's head. It's a way of showing the world she is under the power and authority God gave in this life, to be over her.