It has been pointed out to me that those who struggle with mental illness unmedicated and underserved are lost souls who need our prayers. I think that is very true. There are so many people who are wandering around, either literally or figuratively, being tortured with moods, thoughts and voices, who are not getting the help they need. It is often beyond humanity's ability to help them, especially when they will not accept offers of help.
Thankfully, Jesus came to save souls, especially lost ones. He is the Divine Physician who came to heal the sick. He holds each of them in his Sacred Heart.
Thanks to Cece from the Catholic Answers Forum for suggesting this metaphor.