I don't know if this has to do with core beliefs, but you could say I'm doing art therapy right now. I've been drawing comics about all my life, and I recently started this one where this character from my comic about an alien super hero team gets sick with depression, and it gets to the point where the metaphors I get for the way I feel when I'm depressed become literal for the character in this storyline. For instance, I kind of feel a bit like I'm turning into a monster when my depression is bad, something different than what I normally am, and this literally happens to the character, toward the second half. Like he starts losing control over himself as that other side takes over.
A lot comes from doing this. I'm really artistic so making a comic like this helps me to get things out, other than just relating how I feel through words. Like I kind of express my feelings through that character, without having to reflect too much on my specific circumstances. It also even kind of gives me a glimpse of what it might be like for other people around me to see me depressed, which I wasn't really expecting. It's very dramatic right now because I'm still in the middle of the plotline, but I expect it might make me feel better or hopeful once I finally get to the happy ending in the comic. And I love making art that really expresses something I'm feeling strongly, because that's what turns out best. As much as I don't like the "dramatic" times in my life, sometimes that's when I make the best art. And it gives me something to feel excited about when I'm making something awesome.
So yeah, definitely recommend it if you're on the artsy side, especially. It really can be expressive and even enlightening, though it can be pretty hard to want to make art when you're feeling low. A lot of my projects have gone neglected for a while now.