I believe that the following quote from John Adams, specifically the parts in bold, speak to the current condition of our country and why we have lost so many of our freedoms and are faced with losing many more.
It comes from a letter Adams wrote on 11 October 1798 to the officers of the First Brigade, Third Division, of the Massachusetts Militia. The relevant text reads:
"But should the people of America once become capable of that deep simulation towards one another, and towards foreign nations, which assumes the language of justice and moderation while it is practising iniquity and extravagance, and displays in the most captivating manner the charming pictures of candor, frankness, and sincerity, while it is rioting in rapine and insolence, this country will be the most miserable habitation in the world; because we have no government armed with power capable of contending with human passions unbridled by morality and religion. Avarice, ambition, revenge, or gallantry, would break the strongest cords of our Constitution as a whale goes through a net. Our Constitution was made only for a moral and religious people. It is wholly inadequate to the government of any other."
A few more founders quotes that follow in a similar vein:
"Of all the dispositions and habits, which lead to political prosperity, Religion and Morality are indispensable supports. In vain would that man claim the tribute of Patriotism, who should labor to subvert these great pillars of human happiness, these firmest props of the duties of Men and Citizens. The mere Politician, equally with the pious man, ought to respect and to cherish them. A volume could not trace all their connexions with private and public felicity. Let it simply be asked, Where is the security for property, for reputation, for life, if the sense of religious obligation desert the oaths, which are the instruments of investigation in Courts of Justice? And let us with caution indulge the supposition, that morality can be maintained without religion. Whatever may be conceded to the influence of refined education on minds of peculiar structure, reason and experience both forbid us to expect, that national morality can prevail in exclusion of religious principle.
It is substantially true, that virtue or morality is a necessary spring of popular government. The rule, indeed, extends with more or less force to every species of free government. Who, that is a sincere friend to it, can look with indifference upon attempts to shake the foundation of the fabric?"
-George Washington
"Only a virtuous people are capable of freedom. As nations become corrupt and vicious, they have more need of masters."
-Benjamin Franklin