However, the free exercise of religion is absolute only in terms of belief. There is no total freedom in regard to action. While belief cannot be established by law, actions can be limited by law.
Government does have authority to uphold law and order, otherwise society has social anarchy.
On the other hand, government is limited in regard to making certain laws, otherwise society has total tyranny. One limitation placed on government prohibits laws for the mind. The wall of separation about which Jefferson wrote is built between government and belief. The free exercise of religion, in terms of belief, may not be prohibited, but, in terms of action, it may be limited. In 1879 the U.S. Supreme Court quoted Jefferson and ruled polygamy unconstitutional regardless of religious belief.