"Secrecy is the first essential in affairs of state."
"Disguise the knowledge of kings."
"Carry on any enterprise as if all future success depended on it."
"Friendship is the medicine for all misfortune; but ingratitude dries up the fountain of all goodness."
"Nothing is as dangerous for the state as those who would govern kingdoms with maxims found in books."
"A single word has sometimes lost or won an empire."
"First, all means to conciliate; failing that, all means to crush."
"One must believe neither the people of the palace, who ordinarily measure the power of the king by the shape of his crown, which, being round, has no end, nor those who, in the excesses of an indiscreet zeal, proclaim themselves openly as partisans of Rome."
"If you give me six lines written by the hand of the most honest of men, I will find something in them which will hang him."