“There is the world of ideas and there is the world of practice; the French are often for suppressing the one and the English the other; but neither is to be suppressed.”

Book XXII, sec. 39
History of Rome

2009, A New Beginning (June 2009)
Context: Suppressing ideas never succeeds in making them go away. America respects the right of all peaceful and law-abiding voices to be heard around the world, even if we disagree with them. And we will welcome all elected, peaceful governments - provided they govern with respect for all their people.
This last point is important because there are some who advocate for democracy only when they are out of power; once in power, they are ruthless in suppressing the rights of others. No matter where it takes hold, government of the people and by the people sets a single standard for all who hold power: you must maintain your power through consent, not coercion; you must respect the rights of minorities, and participate with a spirit of tolerance and compromise; you must place the interests of your people and the legitimate workings of the political process above your party. Without these ingredients, elections alone do not make true democracy.

1850s, Latter-Day Pamphlets (1850), Stump Orator (May 1, 1850)

Source: Alternating Current (1967), p. 105
Context: Many psychiatrists think, like Huxley, that these substances [hallucinogens] are neither more nor less dangerous than alcohol. It is not necessary to entirely accept this opinion — although to me it seems to be not far from the truth — in order to recognize that the authorities prohibit these drugs not so much in the name of public health as in the name of public morality. They are a challenge to the ideals of activity, utility, progress, work, and similar notions that justify our daily routine. Alcoholism is an infraction of social rules. Everyone tolerates it because the violation confirms the rules. This case is analogous to prostitution: neither the drunk nor the prostitute and her clientele call into doubt the rules they break. Their acts are a disturbance of order, not a criticism of it. The use of hallucinogens, on the other hand, implies a negation of prevailing social values. … We can now understand the true reason for their condemnation and its severity. The authorities aren’t suppressing a reprehensible practice or a crime. They are suppressing dissidence. … Prohibition is a battle against a contagion of the spirit — against an opinion. The authorities reveal, in their ideological zeal, that they are pursuing a heresy, not a crime.

Source: A for Anything (1959), Chapter 10 (p. 120)

The Syntax of Sorcery (2012)
Context: I'll say this much: virtually every advancement made by our species since civilization first peeked out of its nest of stone has been initiated by lone individuals, mavericks who more often than not were ignored, mocked, or viciously persecuted by society and its institutions. Society in general maintains such a vested interest in its cozy habits and solidified belief systems that it had rather die – or kill – than entertain change. Consider how threatened religious fundamentalists of all faiths remain to this day by science in general and Darwin in particular.
Cultural institutions by and large share one primary objective: herd control. Even when ostensibly benign, their propensity for manipulation, compartmentalization, standardization and suppression of potentially disruptive behavior or ideas, has served to freeze the evolution of consciousness practically in its tracks. In technological development, in production of material goods and creature comforts, we've challenged the very gods, but psychologically, emotionally, we're scarcely more than chimpanzees with bulldozers, baboons with big bombs.

Lectures in philosophy [Leçons de philosophie] (1959) as translated by Hugh Price p. 103

Source: Essays: First Series

Source: "Evolutionary Socialism" (1899) https://www.marxists.org/reference/archive/bernstein/works/1899/evsoc/index.htm, Chapter III, The Tasks and Possibilities of Social Democracy