'Angels' in the Bible

For it seems to me that God has put us the Apostles last of all, as men whose fate is death: for we are put on view to the world, and to angels, and to men.

Is it not certain that we are to be the judges of angels? how much more then of the things of this life?

For this reason it is right for the woman to have a sign of authority on her head, because of the angels.

If I make use of the tongues of men and of angels, and have not love, I am like sounding brass, or a loud-tongued bell.