I was just reading something similar the other day:
"Because of the essential irrationality of this power, even the best-intentioned of public speakers probably do more harm than good. When an orator, by the mere magic of words and a golden voice, persuades his audience of the rightness of a bad cause we are very properly shocked. We ought to feel the same dismay whenever we find the same irrelevant tricks being used to persuade people of the rightness of a good cause. The belief engendered may be desirable, but the grounds for it are intrinsically wrong, and those who use the devices of oratory for instilling even the right beliefs are guilty of pandering to the least creditable elements in human nature. By exercising their disastrous gift of gab, they deepen the quasi-hypnotic trance in which human beings live and from which it is the aim and purpose of all true philosophy, all genuinely spiritual religion to deliver them. Moreover, there cannot be effective oratory without over-simplification. But you cannot over-simplify without distorting the facts. Even when he is doing his best to tell the truth, the successful orator is ipso facto a liar. And most successful orators, it is hardly necessary to add, are not even trying to tell the truth; they are trying to evoke sympathy for their friends and antipathy for their opponents." (A. Huxley - the Devils of Loudun, 1952) *my bolding*
Regarding the article, keep in mind that nobody can actually "rob us of our capacities to reason" (unless they're using drugs or similar tactics), we are surrendering them ourselves. Even with the most charismatic of people, the ones who make you feel almost spellbound, you still have the choice of going home and actually think about their words (doesn't hurt to see how well they align with their actions either), analyse their position and message and put them in perspective instead of blindly adopting them on the spur of the moment. Critical thinking is of essence when forming opinions or adhering to a belief system, as basing your choice almost exclusively on feeling and perception can be absolutely disastrous for both yourself and those around you.
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"Facts do not cease to exist because they are ignored." Aldous Huxley