The First Amendment in the Bill of Rights says the following:
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
Pay specific attention to the italicized part about religion. What does this text mean? Why do you think the Founding Fathers included this in the Bill of Rights?