Daily Life of Muslims Muslims are prohibited from certain activities like consuming pork, alcohol or drugs. They are also forbidden from gambling, fortune-telling, killing, lying, stealing, cheating, oppressing others, or having sex outside of marriage. The role of clergy in Islam is non-hierarchical - each person has a direct relationship with God without intermediaries. To convert to Islam, one simply needs to believe in and recite the shahada, as there is no formal conversion ceremony.