"The end justifies the means."

"One change always leaves the way open for the introduction of another."

"There is no other way to guard yourself against flattery than by making men understand that telling you the truth will not offend you."

"It is better to be impetuous than cautious, because Fortune is a woman, and if you wish to control her, it is necessary to beat and ill-use her."

"Where the willingness is great, the difficulties cannot be great."