... Folly is a more dangerous enemy to the good than evil. You can protest against evil;
you can unmask it or prevent it by force. Evil always contains the seeds of its own destruction, for it always makes men uncomfortable, if nothing worse. There is no defense against folly. Neither protests nor force are of any avail against it, and it is never amenable to reason. If facts contradict personal prejudices, there is no need to believe them, and if they are undeniable, they can simply be pushed aside as exceptions. Thus the fool, as compared with the scoundrel, is invariably self-complacent. And he can easily become dangerous, for it does not take much to make him aggressive. Hence folly requires much more cautious handling than evil. We shall never again try to reason with the fool, for it is both useless and dangerous.
To deal adequately with folly it is essential to recognize it for what it is. This much is certain: it is a moral rather than an intellectual defect. There are men of great intellect who are fools, and men of low intellect who are anything but fools, a discovery we make to our surprise as a result of particular circumstances. The impression we derive is that folly is acquired rather than congenital; it is acquired in certain circumstances where men make fools of themselves or allow others to make fools of them. We observe further that folly is less common in the unsociable or the solitary than in individuals or groups who are inclined or condemned to sociability. From this it would appear that folly is a sociological problem rather than one of psychology. It is a special form of the operation of historical circumstances upon men, a psychological by-product of definite external factors. On closer inspection it would seem that any violent revolution, whether political or religious, produces an outburst of folly in a large part of mankind. Indeed, it would seem to be almost a law of psychology and sociology. The power of one needs the folly of the other. It is not that certain aptitudes of men, intellectual aptitudes for instance, become stunted or destroyed. Rather, the upsurge of power is so terrific that it deprives men of an independent judgement, and they give up trying –-- more or less unconsciously –-- to assess the new state of affairs for themselves. The fool can often be stubborn, but this must not mislead us into thinking he is independent. One feels somehow, especially in conversation with him, that it is impossible to talk to the man himself, to talk to him personally. Instead, one is confronted with a series of slogans watchwords, and the like, which have acquired power over him. He is under a curse, he is blinded, his very humanity is being prostituted and exploited. Once he has surrendered his will and become a mere tool, there are no lengths of evil to which the fool will not go, yet all the time he is unable to see that it is evil. Here lies the danger of a diabolical exploitation of humanity, which can do irreparable damage to the human character ...
-- Dietrich Bonhoeffer
hattip: https://creativeconflictwisdom.wordpress.com/2014/03/02/of-folly-by-dietrich-bonhoeffer-1906-45/