Amendment IX: Samuel Adams, The Rights of the Colonists

In short it is the greatest absurdity to suppose it in the power of one or any number of men at the entering into society, to renounce their essential natural rights, or the means of preserving those rights when the great end of civil government from the very nature of its institution is for the support, protection and defence of those very rights: the principal of which as is before observed, are life liberty and property. If men through fear, fraud or mistake, should in terms renounce and give up any essential natural right, the eternal law of reason and the great end of society, would absolutely vacate such renunciation; the right to freedom being the gift of God Almighty, it is not in the power of Man to alienate this gift, and voluntarily become a slave–

http://press-pubs.uchicago.edu/founders/documents/amendIXs3.html