"Those who have caused me the greatest disgust so far are the parasites of the spirit: we already encounter them everywhere in our sick Europe; and they consider their morality to be the best in the world. They may be a little melancholic, with an air of pessimism, but above all they are insatiable, filthy, spreading filth everywhere, subterranean, people who intrude everywhere, who thrive on theft, vulgar - and innocent, like all little sinners and microbes. They live at the expense of other people who possess spirit and share it generously: they know that it is fitting for the very nature of the rich spirit to live selflessly, without the slightest, petty concern for tomorrow, and to squander itself carelessly. - Because the spirit is a bad manager and pays no attention at all to the fact that everything lives and feeds on it."
(F. Nietzsche)