Secrecy
"None are so fond of secrets as those who do not mean to keep them; such persons covet secrets as a spendthrift covets money, for the purpose of circulation." - Charles Caleb Colton, Lacon
"I know that's a secret, for it's whispered everywhere." - William Congreve, Love for Love
"The greatest pleasure I know is to do a good action by stealth, and to have it found out by accident." - Charles Lamb, Table Talk