No chapter in human history has been so largely written in terms of persecution and intolerance as the one dealing with religious freedom. From ancient times to the present day, the ingenuity of man has known no limits in its ability to forge weapons of oppression for use against … those who dare to express or practice unorthodox religious beliefs. And the Jehovah's Witnesses are living proof of the fact that, even in this nation, conceived as it was in the ideals of freedom, the right to practice religion in unconventional ways is still far from secure. Theirs is a militant and unpopular faith, pursued with a fanatical zeal. They have suffered brutal beatings; their property has been destroyed; they have been harassed at every turn by the resurrection and enforcement of little used ordinances and statutes.... To them, along with other present-day religious minorities, befalls the burden of testing our devotion to the ideals and constitutional guarantees of religious freedom. We should therefore hesitate before approving the application of a statute that might be used as another instrument of oppression. Religious freedom is too sacred a right to be restricted or prohibited in any degree without convincing proof that a legitimate interest of the state is in grave danger.