This is by the Persian poet Sa’adi (1210 – 1290)
‘Human Beings are Members of a Whole’
Human beings are members of a whole,
In creation of one essence and soul.
If one member is afflicted with pain,
Other members uneasy will remain.
If you have no sympathy for human pain,
The name of human you cannot retain.
It graces the entrance of the Hall of Nations of the United Nations building in New York City. I copied it from Juan Cole this morning. And he copied it from a statement on Iran by engaged scholars. Well worth a read or at least a scan. There are forty signatures.