"A general dissolution of principles and manners will more surely overthrow the liberties of America than the whole force of the common enemy. While the people are virtuous they cannot be subdued; but when they lose their virtue they will be ready to surrender their liberties to the first external or internal invader....If virtue and knowledge are diffused among the people, they will never be enslaved. This will be their greatest security."
"Neither the wisest constitution nor the wisest laws will secure the liberty and happiness of a people whose manners are universally corrupt."
"He therefore is the truest friend to liberty of his country who tries most to promote its virtue, and who, so far as his power and influence extend, will not suffer a man to be chosen into any office of power and trust who is not a wise and virtuous man....The sum of all is, if we would most truly enjoy this gift of Heaven, let us become a virtuous people."