To suffer the civil magistrate to intrude his powers into the field of opinion and to restrain the profession or propagation of principles, on the supposition of their ill tendency, is a dangerous fallacy, which at once destroys all religious liberty, because he being of course judge of that tendency, will make his opinions the rule of judgment, and approve or condemn the sentiments of others only as they shall square with or differ from his own.

Thomas Jefferson (1743-1826) American political philosopher, polymath, statesman, US President (1801-09)

“Virginia Statute for Religious Freedom” (18 Jun 1779; enacted 16 Jan 1786)
    (Source)