“Better to keep your mouth shut and appear stupid than to open it and remove all doubt”

“The man with a new idea is a crank until the idea succeeds”

“Any fool can critizise, condemn and complain – and most fools do”

“When a stupid man is doing something he is ashamed of, he always declares that it is his duty”

“A wise man gets more use from his enemies than a fool from his friends”

“Once harm has been done, even a fool understands it”