Proverbial Wife posted a piece of David Keirsey's Please Understand Me II in which he claims biblical support for the four temperaments he discusses at length in his book. He sees them symbolized by the four faces on the theophany of Ezekiel 1 and the four bodies on the living creatures around the throne in Revelation 4. He also thinks each gospel writer was of a different personality type, thus representing each type's distinctive account of the gospel story. I commented on her site, but I realized after I posted it that it was a significant chunk of writing and might as well go on my own blog. I already submitted it there, so it's there in case you want to read her whole post before seeing my discussion, but I figured if I'm going to write four substantial paragraphs (one for each temperament?) then I might as well post it on my own blog, especially because I've been over-politicking lately for my tastes. Here's my comment on her post:
Daniel Block's commentary on Ezekiel is probably the latest in-depth commentary on the book, and he doesn't have anything about personality types. He does say that it symbolized some particular things for people of that time and place. The lion is strength and courage, the ox fertility and agriculture, the eagle speed and stateliness, and the human reason. These would symbolize God's supremacy in all these ways. Also, they reflect the height of creation in each of four categories -- wild animals, domesticated animals, birds, and humans as the height of all creation.
Robert Mounce's Revelation commentary takes the ox's importance as the ability to serve. Otherwise the roles are similar to Block's with the Ezekiel passage. Mounce says that Irenaus apparently thought these symbolized the four gospels, with each assigned an animal, but there's no support for that anywhere before him as far as I can tell. It seems Irenaus was doing what Keirsey does here in taking any time the number 4 appears and assuming that it has to do with the same subject but this time further adding that anything having to do with 4 must have to do with the four temperaments. It's a double non sequitur.
Greg Beale's Revelation commentary has some interesting suggestions, seeing sources in intertestamental apocalyptic literature. He agrees with Mounce and Block in seeing these symbolizing the created order and with Block in also seeing them symbolizing the creator. The many eyes in the living beings is omniscience, for instance. The serve the master around his throne but also search the earth and play a role in judgment. So there are plenty of things the different elements might symbolize here, but none of these commentators suggest anything about four different human personality types.
I don't know what I think about the gospel proposal. When I first read it a while back, I thought he was oversimplifying or reading beyond the evidence. The second time I read it I could see how the writing styles in some ways do reflect what he's saying. Now I think there's something to that, but I also think there are ways you can see John as a rationalist, Matthew as a rationalist, Luke as a guardian, Luke as an idealist, etc. Mark as an artisan is dead-on no matter how you slice it, and I don't think any of the others could have been artisans. There's no way John was a guardian, and I wouldn't expect Matthew to be an idealist. I'm not sure we could pigeonhole any of them beyond those, but the categories as he's assigned them are plausible, and the neatness of it all working out systematically makes it nice if he's right (but that's the guardian in me).