Surfeits of happiness are fatal.
Sometimes it proves the highest understanding not to understand.
One must pass through the circumference of time before arriving at the center of opportunity.
Courtesy is the politic witchery of great personages.
Keep to yourself the final touches of your art.
No one demands more caution than a spy, and when someone has the skeleton key to minds, counter him by leaving the key of caution inside, on the other side of the keyhole.