Well.... Who cares what people think is in the constitution, here are the facts...

Amendment I - Freedom of Religion, Press, Expression. Ratified 12/15/1791.

Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances.

On Religion- The first amendment prohibits the U.S. government (or state/local gov't) of establishing a state religion and has later been to strike down laws which have favored or suppressed one religion over others. This is known as the establishment clause and it was added because of concerns over the roll of state churches in Europe. The other is freedom of expression which is fairly easy to understand but is much harder to enforce.

"A wall of Seperation of Church and State" comes from a letter Jefferson wrote to the Danbury, Connecticut Baptist organization who were discriminated against by the state. It has since been used mainly to discribe the establishment clause of the constitution.

http://www.albertlowe.com/danbury.html