The maturity of man—that means, to have reacquired the seriousness that one had as a child at play
Beyond Good and EvilOn the whole human beings want to be good, but not too good, and not quite all the time.
All Art is Propaganda: Critical EssaysThere is no good and evil, there is only power and those too weak to seek it.
Harry Potter and the Sorcerer's StoneJohn [to Sherlock]: You're incredible. A genius. A good friend. And a lousy driver.
Sherlock: The Casebook