There is much suffering in the world - physical, material, mental. The suffering of some can be blamed on the greed of others. The material and physical suffering is suffering from hunger, from homelessness, from all kinds of diseases. But the greatest suffering is being lonely, feeling unloved, having no one. I have come more and more to realize that it is being unwanted that is the worst disease that any human being can ever experience.
Variability is the law of life, and as no two faces are the same, so no two bodies are alike, and no two individuals react alike and behave alike under the abnormal conditions which we know as disease.