Jefferson's metaphor of a wall of separation has been cited repeatedly by the U.S. Supreme Court. In Reynolds v. United States (1879) the Court wrote that Jefferson's comments "may be accepted almost as an authoritative declaration of the scope and effect of the [First] Amendment." In Everson v. Board of Education (1947), Justice Hugo Black wrote: "In the words of Thomas Jefferson, the clause against establishment of religion by law was intended to erect a wall of separation between church and state."
Who made a metaphor about a wall of separation? What has the U.S. Supreme Court repeatedly cited? When was the case of Reynolds v. United States? What did the Court write about Jefferson's comments as it related to the scope and effect of the First Amendment? What was the clause against establishment of religion by law intended to erect?