All illness is a great leveller, but none levels like mental illness. It remains the poor relation of medicine. Research is paltry. Therapies are halfhearted. Drugs are primitive. But addictive and depressive illness seems to probe deep into the relations between individuals and those around them. It is the crack in the window that can seem beyond mending. The sadness of the clown goes beyond irony. It is one of the great mysteries of life.
The above quote is from Simon Jenkins' GUARDIAN article on the death of Robin Williams: