My favorite quote: “Politics is a strong and slow boring of hard boards. It takes both passion and perspective. Certainly all historical experience confirms the truth that man would not have attained the possible unless time and again he had reached out for the impossible. But to do that a man must be a leader, and not only a leader but a hero as well, in a very sober sense of the word […]. Only he has the calling for politics who is sure that he shall not crumble when the world from his point of view is too stupid or too base for what he wants to offer. Only he who in the face of all this can say 'In spite of all!' has the calling for politics.” 
(Max Weber- Politics as a vocation)