Machiavelli is a realist thinker who gives theories in terms of power. He in his book "The Prince" gave this statement/ advice to the prince. That, Prince, should rule with the cleverness like a fox and the braveness like a lion at the same time. The purpose of these dual values in the prince is to make him rule for a long time solely for the national interest. He suggests to the prince that it is better to be feared than to be loved by the people.
His own experience in the field of bureaucracy reflects in his book. In the late 15th century Italy was in a state of corruption. Italy was the seat of the Roman church. Roman church was the corrupt institution and source of all evil. The church was the main reason for the non-unification of Italy into a nation-state. According to Machiavelli, Prince must use his iron hand to rule the corrupt state. Support the common people over noble because feudalism is in its breakdown stage but stay sceptical for others.
He believes that men are by nature ungrateful, deceitful, coward, fickle-minded and avaricious. Man is soo greedy that he can easily forget the loss of his father than the loss of his patrimony. So, the wise prince must execute rather than confiscate, understand the basic nature of man and use it in politics accordingly. On this advice, Sabine criticizes him by calling him "narrowly dated, narrowly located". His description of human nature is too much shaped by his experience of human nature during his time in Italy.
Initially, reason and philosophy were two important qualities that the prince must-have. Machiavelli gave psychology and history to the prince to understand human nature and better guide for politics. As Dunning said, "everybody is Machiavelli, but no one dares to admit it."