She refused and her son came to my father in secret. ‘This maulana is starting a campaign against you,’ he warned. ‘We won’t give him the building but be careful.’

My father was angry. ‘Just as we say, “Nim hakim khatrai jan” – “Half a doctor is a danger to one’s life,” so, “Nim mullah khatrai iman” – “A mullah who is not fully learned is a danger to faith”,’ he said.

I am proud that our country was created as the world’s first Muslim homeland, but we still don’t agree on what this means. The Quran teaches us sabar – patience – but often it feels that we have forgotten the word and think Islam means women sitting at home in purdah or wearing burqas while men do jihad. We have many strands of Islam in Pakistan. Our founder Jinnah wanted the rights of Muslims in India to be recognised, but the majority of people in India were Hindu. It was as if there was a feud between two brothers and they agreed to live in different houses. So British India was divided in August 1947, and an independent Muslim state was born. It could hardly have been a bloodier beginning. Millions of Muslims crossed from India, and Hindus travelled in the other direction. Almost two million of them were killed trying to cross the new border. Many were slaughtered on trains which arrived at Lahore and Delhi full of bloodied corpses. My own grandfather narrowly escaped death in the riots when his train was attacked by Hindus on his way home from Delhi, where he had been studying. Now we are a country of 180 million and more than 96 per cent are Muslim. We also have around two million Christians and more than two million Ahmadis, who say they are Muslims though our government says they are not. Sadly those minority communities are often attacked.

Jinnah had lived in London as a young man and trained as a barrister. He wanted a land of tolerance. Our people often quote the famous speech he made a few days before independence: ‘You are free to go to your temples, you are free to go to your mosques or to any other place of worship in this State of Pakistan. You may belong to any religion or caste or creed – that has nothing to do with the business of the state.’ My father says the problem is that Jinnah negotiated a piece of real estate for us but not a state. He died of tuberculosis just a year after the creation of Pakistan and we haven’t stopped fighting since. We have had three wars against India and what seems like endless killing inside our own country.

We Muslims are split between Sunnis and Shias – we share the same fundamental beliefs and the same Holy Quran but we disagree over who was the right person to lead our religion when the Prophet died in the seventh century. The man chosen to be the leader or caliph was Abu Bakr, a close friend and adviser of the Prophet and the man he chose to lead prayers as he lay on his deathbed. ‘Sunni’ comes from the Arabic for ‘one who follows the traditions of the Prophet’. But a smaller group believed that leadership should have stayed within the Prophet’s family and that Ali, his son-in-law and cousin, should have taken over. They became known as Shias, shortened from Shia-t-Ali, the Party of Ali.

Every year Shias commemorate the killing of the Prophet’s grandson Hussein Ibn Ali at the battle of Karbala in the year 680 with a festival called Muharram. They whip themselves into a bloody frenzy with metal chains or razor blades on strings until the streets run red. One of my father’s friends is a Shia and he cries whenever he talks about Hussein’s death at Karbala. He gets so emotional you would think the events had happened just the night before, not more than 1,300 years ago. Our own founder, Jinnah, was a Shia, and Benazir Bhutto’s mother was also a Shia from Iran.

Most Pakistanis are Sunnis like us – more than eighty per cent – but within that we are again many groups. By far the biggest group is the Barelvis, who are named after a nineteenth-century madrasa in Bareilly, which lies in the Indian state of Uttar Pradesh. Then we have the Deobandi, named after another famous nineteenth-century madrasa in Uttar Pradesh, this time in the village of Deoband. They are very conservative and most of our madrasas are Deobandi. We also have the Ahl-e-Hadith (people of the Hadith), who are Salafists. This group is more Arab-influenced and even more conservative than the others. They are what the West calls fundamentalists. They don’t accept our saints and shrines – many Pakistanis are also mystical people and gather at Sufi shrines to dance and worship. Each of these strands has many different subgroups.

The mufti on Khushal Street was a member of Tablighi Jamaat, a Deobandi group that holds a huge rally every year at its headquarters in Raiwind, near Lahore, attended by millions of people. Our last dictator General Zia used to go there, and in the 1980s, under his regime, the Tablighis became very powerful. Many of the imams appointed to preach in army barracks were Tablighis and army officers would often take leave and go on preaching tours for the group.

One night, after the mufti had failed to persuade our landlady to cancel our lease, he gathered some of the influential people and elders of our mohalla into a delegation and turned up at our door. There were seven people – some other senior Tablighis, a mosque keeper, a former jihadi and a shopkeeper – and they filled our small house.

My father seemed worried and shooed us into the other room, but the house was small so we could hear every word. ‘I am representing the Ulema and Tablighian and Taliban,’ Mullah Ghulamullah said, referring to not just one but two organisations of Muslim scholars to give himself gravitas. ‘I am representing good Muslims and we all think your girls’ school is haram and a blasphemy. You should close it. Girls should not be going to school,’ he continued. ‘A girl is so sacred she should be in purdah, and so private that there is no lady’s name in the Quran as God doesn’t want her to be named.’

My father could listen no more. ‘Maryam is mentioned everywhere in the Quran. Was she not a woman and a good woman at that?’

‘No,’ said the mullah. ‘She is only there to prove that Isa [Jesus] was the son of Maryam, not the son of God!’

‘That may be,’ replied my father. ‘But I am pointing out that the Quran names Maryam.’

The mufti started to object but my father had had enough. Turning to the group, he said, ‘When this gentleman passes me on the street, I look to him and greet him but he doesn’t answer, he just bows his head.’

The mullah looked down embarrassed because greeting someone properly is important in Islam. ‘You run the haram school,’ he said. ‘That’s why I don’t want to greet you.’

Then one of the other men spoke up. ‘I’d heard you were an infidel,’ he said to my father, ‘but there are Qurans in your room.’

‘Of course there are!’ replied my father, astonished that his faith would be questioned. ‘I am a Muslim.’

‘Let’s get back to the subject of the school,’ said the mufti, who could see the discussion was not going his way. ‘There are men in the reception area of the school, and they see the girls enter, and this is very bad.’

‘I have a solution,’ said my father. ‘The school has another gate. The girls will enter through that.’

The mullah clearly wasn’t happy as he wanted the school closed altogether. But the elders were happy with this compromise and they left.

My father suspected this would not be the end of the matter. What we knew and they didn’t was that the mufti’s own niece attended the school in secret. So a few days later my father called the mufti’s elder brother, the girl’s father.

‘I am very tired of your brother,’ he said. ‘What kind of mullah is he? He’s driving us crazy. Can you help to get him off our backs?’

‘I’m afraid I can’t help you, Ziauddin,’ he replied. ‘I have trouble in my home too. He lives with us and has told his wife that she must observe purdah from us and that our wives must observe purdah from him, all in this small space. Our wives are like sisters to him and his is like a sister to us, but this madman has made our house a hell. I am sorry but I can’t help you.’