Stupidity

If the fool would persist in his folly he would become wise

None but blockheads copy each other

The hours of folly are measured by the clock, but of wisdom no clock can measure.

The obstinacy of cleverness and reason is nothing to the obstinacy of folly and inanity

One wise man's verdict outweighs all the fools

There is as much trickery required to grow rich by a stupid book as there is folly in buying it

There are only two ways of getting on in the world either by one's own industry, or by the stupidity of others

There is no class so pitiably wretched as that which possesses money and nothing else

We smile at the ignorance of the savage who cuts down the tree in order to reach its fruit; but the same blunder is made by every person who is over eager and impatient in the pursuit of pleasure.

The silliest woman can manage a clever man; but it needs a very clever woman to manage a fool

Education is a crutch with which the foolish attack the wise to prove that they are not idiots

Stupidity gets up early; that is why events are accustomed to happening in the morning.

An illusion of depth often occurs if a blockhead is a muddlehead at the same time

Stupidity is an elemental force for which no earthquake is a match

A book is a mirror: If an ass peers into it, you can't expect an apostle to look out

A clever child brought up with a foolish one can itself become foolish. Man is so perfectible and corruptible he can become a fool through good sense

As to the pure mind all things are pure, so to the poetic mind all things are poetical