愚蠢
The difference between stupid and intelligent people—and this is true whether or not they are well-educated—is that intelligent people can handle subtlety.
The hours of folly are measured by the clock, but of wisdom: no clock can measure.
"The only thing that is infinite is the universe and human stupidity."
In crowds it is stupidity and not mother-wit that is accumulated.
It is because nations tend to stupidity and baseness that democracy is possible.