"The voices may not be real, but they do have some good ideas" - https://imgur.com/8KjfH56
I've "heard voices" two, maybe three times, spread out over maybe 7 years. Both times they were very helpful. The second time was while walking through my apartment. A very distinct voice said, "You're doing well, now go back to [website] and read about [subject]".
I did as I was told and was amazed - I'd been studying the reports on [website] for years, and just hadn't noticed that [subject] was extensively covered, and was of much importance for getting the author's various ideas to fit together.
One of my passengers has had a complex relationship with her voices. Her psychiatrists tried to snuff them out, but I don't think their efforts were very helpful.