There is no official authority who decides whether a person is accepted into, or dismissed from, the
community of believers, known as the Ummah ("family" or "nation"). Islam is open to all, regardless of race, age, gender, or previous beliefs. It is enough to believe
in the central beliefs of Islam. This is formally done by reciting the shahada, which should be made sincerely from the heart, the statement of belief of Islam, without which a person cannot be classed
a Muslim. It is enough to believe and say that one is a Muslim, and behave in a manner befitting a Muslim to be accepted into
the community of Islam.