I'm looking to find out what the latin for "from the heights" is, as the equivalent of Oscar Wilde's title "De Profundis".
I think the most fitting antonym for de profundis is de caelis (alternatively spelled de coelis). Literally, this means "from the heavens" or "from the skies".
Take a look at what caelum can mean. I used it in the plural. The best choice of words depends on your exact context, of course.