Why is mental illness the most stigmatized illness in Ethiopia? The brain is an organ just like the liver and the kindey so just like the other organs , the mind can also get sick. People suffer from depression and some of them die from suicide. Imagine how painful the illness is that the person suffering from it commits suicide to stop the pain. The most painful pain a person experiences is emotional pain.... I've read it on a research paper. So please be kind to people with mental illness.