Angels

InsightScoop publishes Philosopher Peter Kreeft's book on angels, and has a link to his audio podcast about them.

The Twelve Most Important Things to Know About Them

1. They really exist. Not just in our minds, or our myths, or our symbols, or our culture. They are as real as your dog, or your sister, or electricity.

2. They’re present, right here, right now, right next to you, reading these words with you.

3. They’re not cute, cuddly, comfortable, chummy, or “cool”. They are fearsome and formidable. They are huge. They are warriors.

4. They are the real “extra-terrestrials”, the real “Super-men”, the ultimate aliens. Their powers are far beyond those of all fictional creatures.

5. They are more brilliant minds than Einstein...
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10. Angels often come disguised. “Do not neglect hospitality, for some have entertained angels unawares”—that’s a warning from life’s oldest and best instruction manual.
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St Michael is usually shown in art wearing the "skirt" of a Roman warrior, with long hair: this makes him appear a bit effeminate.
But Andrew Greeley has him appear in one novel dressed as a Navy Seal.
And one major film has an angel as one of the heroes: In LOTR, Gandalf is an angel (messenger/spirit) according to Tolkien.