Stupidity does not consist of having no ideas but of having stupid ones.

Every day stupid people say things which are not so stupid.

It's stupidity to live poor and die rich.

To be clever enough to get plenty of money you must be stupid enough to want it.

A great deal of learning can be packed into an empty head.

Don't be too clever for your own good.

Fools build houses - the wise live in them.

To pay in advance is to be served badly.

We mock what we don't understand.

To forgive easily is to invite insults.

Trusting a lot has ruined a lot.

Just pretending to be rich has kept many poor.

If it's not broken, don't try to mend it.

As a last resort, read the instructions.

Too much cleverness is folly.

You always pay for your stupidity one way or another.

Stupidity is being unwilling to make use of any knowledge.

One may appear sincere and still be stupid.