A man always is to be himself the judge of how much of his mind he will show to other men; even to those he would have work along with him. There are impertinent inquiries made: your rule is to leave the inquirer uninformed on that matter; not, if you can help it, misinformed; but precisely as dark as he was!
Thomas Carlyle (1795-1881) Scottish essayist and historian
“The Hero as King,” On Heroes, Hero-Worship, and the Heroic in History (1841)