Quote #157: Jefferson on the nature of freedom of religion

Well aware that the opinions and belief of men depend not on their own will, but follow involuntarily the evidence proposed to their minds; that Almighty God hath created the mind free, and manifested his supreme will that free it shall remain by making it altogether insusceptible of restraint; that all attempts to influence it by temporal punishments, or burthens, or by civil incapacitations, tend only to beget habits of hypocrisy and meanness, and are a departure from the plan of the holy author of our religion, who being lord both of body and mind, yet chose not to propagate it by coercions on either, as was in his Almighty power to do, but to extend it by its influence on reason alone[.] 

--  The Virginia Act for Establishing Religious Freedom (1786).

Quote #156: Thomas Jefferson on federalism and the free exercise of religion

"In matters of religion, I have considered that its free exercise is placed by the constitution independent of the powers of the general government. I have therefore undertaken, on no occasion, to prescribe the religious exercises suited to it; but have left them, as the constitution found them, under the direction and discipline of state or church authorities acknowledged by the several religious societies."

- Second Inaugural Address, March 4, 1805.