It is thus the justice (one would have to say) which must be the main responsibility of a sovereign. Since it is the prime interest of the many peopl… - Frederick II of Prussia

Of all Prussia's neighbours the Russian Empire is the most dangerous, both from its power and its geographical position, and those who rule Prussia after me should cultivate the friendship of those barbarians, because they are able to ruin Prussia altogether through the immense number of their mounted troops, whilst one cannot repay them for the damage which they may do because of the poverty of that part of Russia which is nearest to Prussia, and through which one has to pass in order to get into the Ukraine.

If my soldiers began to think, not one would remain in the ranks.

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.