He who causes another to become powerful ruins himself, for he brings such a power into being either by design or by force, and both of these element… - Niccolò Machiavelli

If you only notice human proceedings, you may observe that all who attain great power and riches, make use of either force or fraud; and what they have acquired either by deceit or violence, in order to conceal the disgraceful methods of attainment, they endeavor to sanctify with the false title of honest gains. Those who either from imprudence or want of sagacity avoid doing so, are always overwhelmed with servitude and poverty; for faithful servants are always servants, and honest men are always poor; nor do any ever escape from servitude but the bold and faithless, or from poverty, but the rapacious and fraudulent. God and nature have thrown all human fortunes into the midst of mankind; and they are thus attainable rather by rapine than by industry, by wicked actions rather than by good. Hence it is that men feed upon each other, and those who cannot defend themselves must be worried.

When everyone feels free to tell you the truth, respect for you dwindles… A wise prince should take another course: choose wise men for your advisors, and allow only them the liberty of speaking the truth to the prince, and only on matters about which you ask, and nothing else. But you should question them about everything, listen patiently to their opinions, then form your own conclusions later.

For this can be said of men in general: that they are ungrateful, fickle, hypocrites and dissemblers, avoiders of dangers, greedy for gain; and while you benefit them, they are entirely yours, offering you their blood, their goods, their life, their children,...when need is far away, but when you actually become needy, they turn away. (translated by Wayne A. Rebhorn)