Kenneson: But why do we have to conclude that Acts 12:15 is referring to a human rather than a guardian angel? Was it not a popular belief of the time that guardian angels were a kind of spiritual "double" of their charges?
Why not? Do angels knock on doors or do they simply appear from nowhere? Your examples demonstrated the latter. Use of messenger for angellos demonstrates this as well. Kenneson: 2 Pet. 2:4 and Jude 6 are both in agreement with 1 Cor. 6:3 No they do not. 2 Peter 2:4 is talking about the Jews that died in the wilderness not non-human beings as you suggest. Paul also discussed them in his work. It is similar also in Jude. Notice: 5 I will therefore put you in remembrance, though ye once knew this, how that the Lord, having saved the people out of the land of Egypt, afterward destroyed them that believed not. 6 And the angels which kept not their first estate, but left their own habitation, he hath reserved in everlasting chains under darkness unto the judgment of the great day. Such verses in Jude are discussing human beings. Both before verse 5 and after. While most were Jews not everyone in that wilderness was Jewish as a vast company of Egyptians went out with them. 38 “And a mixed multitude went up also with them; and flocks, and herds, even very much cattle.” Such too were angels that kept not their first estate. Which first estate? Why the Egypt under discussion here of course. So this makes perfect sense as all those involved in this rebellion are discussed here in Jude. What is your point Kenneson? Do you have information to the contrary? If so please provide it in more detail.
Joseph