Which would nowhere be so dangerous as in the hands of a man who had folly and presumption enough to fancy himself fit to exercise it.

From An Inquiry Into the Nature and Causes of the Wealth of Nations by Adam Smith.

What is the species of domestic industry which his capital can employ, and of which the produce is likely to be of the greatest value, every individual, it is evident, can in his local situation judge much better than any statesman or lawgiver can do for him. The statesman, who should attempt to direct private people in what manner they ought to employ their capitals, would not only load himself with a most unnecessary attention, but assume an authority which could safely be trusted, not only to no single person, but to no council or senate whatever, and which would nowhere be so dangerous as in the hands of a man who had folly and presumption enough to fancy himself fit to exercise it.

"Which would nowhere be so dangerous as in the hands of a man who had folly and presumption enough to fancy himself fit to exercise it." That covers so many conversations these days. People who think they are fit, entitled, indeed, obligated, to intervene and reduce others' freedoms of speech, association and action, simply on the presumption that they know best.