Who said "A good operative is invisible until they need to be seen."?

A good operative is invisible until they need to be seen. - M

"A good operative is invisible until they need to be seen."

"You're not a man, Bond. You're a blunt instrument."

"I think you're still a little jealous of me, aren't you?"

"Quite successful, Bond. Your education was not wasted."

"The world is not enough."