A 13-part worldwide series exploring Man's religious quest. Presented by Ronald Eyre

'It is said in Islam that every child is born Muslim by nature; he has the belief in his heart of one God.'

According to one estimate, one seventh of the population of the world is Muslim. The search for Islam takes Ronald Eyre to two places in Egypt. In Cairo he visits the ancient university of El Azhar, a bastion of Islamic orthodoxy, and meets a remarkable married couple - both of them doctors and devout Muslims. The search leads to a small village on the edge of the Sahara where life is lived as it has been for centuries according to the Islamic ideal of community. 'God is most great. Whatever you think of as great, God is greater.'

(The Long Search Continues, Radio 3, Thursday. A book about the two series will be published shortly)