Cleverness, after all, has its limitations. Its mechanical judgments and clever remarks — Benjamin Hoff
You are very clever,” said the old man shyly. “I would like to eat your brains, one day. — Terry Pratchett
Don’t be too clever for an audience. Make it obvious. Make the subtleties obvious also. — Billy Wilder
There are no circumstances, however unfortunate, that clever people do not extract — François de La Rochefoucauld