Separation of church and state in the United States

"Separation of church and state" is a metaphor paraphrased from Thomas Jefferson and used by others in discussions of the Establishment Clause and Free Exercise Clause of the First Amendment to the United States Constitution, which reads: "Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof". The principle is paraphrased from Jefferson's "separation between Church & State".

Source: Wikipedia — Separation of church and state in the United States (CC BY-SA 4.0)