Bro. Philip Davidson, MD is a general practitioner from the Victor Harbor, South Australia ecclesia, does an excellent overview of what depression is, how it can be treated, and what’s said about in the Bible. Highly recommended.

The class is part of the Good Christadelphian Talks Podcast, #37.  See https://anchor.fm/GCT for both it, and more good Christadelphian talks.
You can also download the class and handouts from https://christadelphianbibletalks.com/

Finally, if you’re not able to find the class from another source, we’re making them available here too:
Audio:  Philip-Davidson-Depression-And-Discipleship.mp3
Slides:  Philip-Davidson-Depression-And-Discipleship.pptx