"God who gave us life, gave us liberty.  And can the liberties of a nation be thought secure when we have removed their only firm basis, a conviction in the minds of the people that these liberties are a gift of God?  That they are not to be violated but with His wrath?  Indeed, I tremble for my country when I reflect that God is just; that His justice cannot sleep forever." 

and in a letter dated March 23, 1801, Jefferson wrote:

"The Christian Religion, when divested of the rags in which they {the clergy} have enveloped it, and brought to the original purity and simplicity of its Benevolent Institutor, is a religion of all others most friendly to liberty, science, and the freest expansion of the human mind."