Some points about Angels
Angels are beings who carry out God’s will on earth.
"And to which of the angels has he ever said, 'Sit at my right hand until I make your enemies a footstool for your feet'? Are they not all ministering spirits sent out to serve for the sake of those who are to inherit salvation?" (Hebrews 1:13,14)
This passage not only points out that the angels are sent out by God to look after those who are to receive salvation, but that they are all sent out by God. There are no angels other than those who serve God.
When an angel speaks it is often carrying a message from God. We saw this in the account of Gideon, but it appears in other places as well. The angel in the wilderness was described in these terms:
"Behold, I send an angel before you to guard you on the way and to bring you to the place that I have prepared. Pay careful attention to him and obey his voice; do not rebel against him, for he will not pardon your transgression, for my name is in him. But if you carefully obey his voice and do all that I say, then I will be an enemy to your enemies and an adversary to your adversaries." (Exodus 23:20-22)
The angel is sent by God to guide the Children of Israel through the desert towards the promised land. Notice, however, the way that the angel speaks. The voice is that of the angel, but the words are those of God. Thus, when the angel spoke it was exactly as though God was speaking.
This leads to a basic principle which can be found in many examples throughout the Bible:
God reveals himself through other beings that are not themselves God.
This principle certainly occurs with angels. It is seen with prophets, with judges and, as the greatest possible example, with Jesus Christ.