Freedom of religion or freedom of belief is a principle that supports the freedom of an individual or community, in public or private, to manifest religion or belief in teaching, practice, worship, and observance. It also includes the freedom to change one's religion or belief.
Freedom of religion is considered by many people and most of the nations to be a fundamental human right. In a country with a state religion, freedom of religion is generally considered to mean that the government permits religious practices of other sects besides the state religion, and does not persecute believers in other faiths.
–New Schaff-Herzog Encyclopedia of Religious Knowledge, Vol. IX: Petri - Reuchlin