Is it reasonable that even the arts should take advantage of and profit by our natural stupidity and feebleness of mind?
In truth, knowledge is a great and very useful quality; those who despise it give evidence enough of their stupidity. Yet I do not set its value at that extreme measure that some attribute to it.
A little folly is desirable in him that will not be guilty of stupidity.
Obstinacy and dogmatism are the surest signs of stupidity. Is there anything more confident, resolute, disdainful, grave and serious than an ass?
Nobody is exempt from saying stupid things, the harm is to do it presumptuously.
To say less of yourself than is true is stupidity, not modesty. To pay yourself less than you are worth is cowardice and pusillanimity.