“There is this peculiarity in our country—the only men who can be trusted with human liberty are the ones who are not to be angels hereafter.”

Section 13; often the final portion of this is quoted alone as: "Absolute faith corrupts as absolutely as absolute power."
Reflections on the Human Condition (1973)
Context: The Savior who wants to turn men into angels is as much a hater of human nature as the totalitarian despot who wants to turn them into puppets.
There are similarities between absolute power and absolute faith: a demand for absolute obedience; a readiness to attempt the impossible; a bias for simple solutions — to cut the knot rather than unravel it; the viewing of compromise as surrender; the tendency to manipulate people and "experiment with blood."
Both absolute power and absolute faith are instruments of dehumanization. Hence absolute faith corrupts as absolutely as absolute power.

From Freedom in Chains: The Rise of the State and the Demise of the Citizen (St. Martin's Press, 1999) http://www.jimbovard.com/Epigram%20page%20Freedom%20in%20Chains.htm

Source: Purity of Blood

Source: The Lessons of History

The Need for Transcendence in the Postmodern World (1994)

Essay published in The Advertiser (1748) http://thingsabove.freerovin.com/samadams.htm and later reprinted in The Life and Public Service of Samuel Adams, Volume 1 (1865), by William Vincent Wells <!-- Little, Brown, and Company; Boston -->
Context: 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 the 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. We must not conclude merely upon a man's haranguing upon liberty, and using the charming sound, that he is fit to be trusted with the liberties of his country. It is not unfrequent to hear men declaim loudly upon liberty, who, if we may judge by the whole tenor of their actions, mean nothing else by it but their own liberty, — to oppress without control or the restraint of laws all who are poorer or weaker than themselves. It is not, I say, unfrequent to see such instances, though at the same time I esteem it a justice due to my country to say that it is not without shining examples of the contrary kind; — examples of men of a distinguished attachment to this same liberty I have been describing; whom no hopes could draw, no terrors could drive, from steadily pursuing, in their sphere, the true interests of their country; whose fidelity has been tried in the nicest and tenderest manner, and has been ever firm and unshaken.
The sum of all is, if we would most truly enjoy this gift of Heaven, let us become a virtuous people.

Now Let Us Address the Main Question: Bicentennial of What?, New York Times (3 July 1976)

Source: The Subtle Art of Not Giving a F*ck (2016), Chapter 8, “The Importance of Saying No” (pp. 182-183)

Source: Every Which Way But Dead