Don’t worry too much about the sailors’ seeing you get a little worried sometimes, one of his chief petty officers had told Geary when he was a lieutenant. That just tells them you’re smart enough to know when to worry. Don’t look too worried, or they’ll think you don’t know what to do. And, for the love of your ancestors, never look like you’re never worried. That’ll make the crew think you’re either an idiot or a fool. They know officers are human, and no human with half a brain is never worried. But as long as you seem to know what you’re doing, they’ll follow you.

John G. Hemry (b. 1956) American naval officer, author [pseud. Jack Campbell]

The Lost Fleet: Beyond the Frontier: Invincible (2012)