When a stupid man is doing something he is ashamed of, he always declares that it is his duty. George Bernard Shaw
Our great democracies still tend to think that a stupid man is more likely to be honest than a clever man, and our politicians take advantage of this prejudice by pretending to be even more stupid than nature made them. Bertrand Russell
An Honest politician will not be tolerated by a democracy unless he is very stupid ... because only a very stupid man can honestly share the prejudices of more than half the nation. Bertrand Russell
There's no drug that'll make a stupid man smart. Robert Charles Wilson
Giving advice to a stupid man is like giving salt to a squirrel. Kashmir Proverb
He who cannot doubt, is a stupid man. German Proverb