The error seems not sufficiently eradicated, that the operations of the mind, as well as the acts of the body, are subject to the coercion of the laws. But our rulers can have no authority over such natural rights, only as we have submitted to them. The rights of conscience we never submitted, we could not submit. We are answerable for them to our God. The legitimate powers of government extend to such acts only as are injurious to others. But it does me no injury for my neighbor to say there are twenty gods, or no God. It neither picks my pocket nor breaks my leg. If it be said, his testimony in a court of justice cannot be relied on, reject it then, and be the stigma on him. Constraint may make him worse. by making him a hypocrite, but it will never make him a truer man. It may fix him obstinately in his errors, but will not cure them. Reason and free inquiry are the only effectual agents against error.
Thomas Jefferson, "Notes on Virginia"
The Writings of Thomas Jefferson, Memorial Edition (Library)
Andrew A. Lipscomb, Editor in Chief, Albert Ellery Bergh, Managing Editor
Volume II - page 221