Machiavel's The Prince is to ethics what the work of Spinoza is to faith. Spinoza sapped the fundamentals of faith, and drained the spirit of religion; Machiavel corrupted policy, and undertook to destroy the precepts of healthy morals: the errors of the first were only errors of speculation, but those of the other had a practical thrust. [...] I always have regarded The Prince as one of the most dangerous works which were spread in the world; it is a book which falls naturally into the hands of princes, and of those who have a taste for policy. [...] There is a real injustice in concluding that the rotten apples are representative of all of them.

Foreword - Anti-Machiavel