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.

Better mad with the rest of the world than wise alone.

One should cultivate good habits of memory, for it is capable of making existence a Paradise or an Inferno.

One must pass through the circumference of time before arriving at the center of opportunity.

Fortune pays you sometimes for the intensity of her favors by the shortness of their duration. She soon tires of carrying any one long on her shoulders.

Hope is a great falsifier. Let good judgment keep her in check.

Help others solve their problems; standing farther away, you can often see matters more clearly than they do. . . The greatest service you can render someone else is helping him or her help themselves.