_Owing to three Errors._—Science has been furthered during recent centuries, partly because it was hoped that God's goodness and wisdom would be best understood therewith and thereby—the principal motive in the soul of great Englishmen (like Newton); partly because the absolute utility of knowledge was believed in, and especially the most intimate connection of morality, knowledge, and happiness—the principal motive in the soul of great Frenchmen (like Voltaire); and partly because it was thought that in science there was something unselfish, harmless, self-sufficing, lovable, and truly innocent to be had, in which the evil human impulses did not at all participate—the principal motive in the soul of Spinoza, who felt himself divine, as a knowing being:—it is consequently owing to three errors that science has been furthered. 38. _Explosive People._—When one considers how ready are the forces of young men for discharge, one does not wonder at seeing them decide so unfastidiously and with so little selection for this or that cause: _that_ which attracts them is the sight of eagerness about any cause, as it were the sight of the burning match—not the cause itself. The more ingenious seducers on that account operate by holding out the prospect of an explosion to such persons, and do not urge their cause by means of reasons; these powder-barrels are not won over by means of reasons! 39. _Altered Taste._—The alteration of the general taste is more important than the alteration of opinions; opinions, with all their proving, refuting, and intellectual masquerade, are merely symptoms of altered taste, and are certainly _not_ what they are still so often claimed to be, the causes of the altered taste. How does the general taste alter? By the fact of individuals, the powerful and influential persons, expressing and tyrannically enforcing without any feeling of shame, _their_ _hoc est ridiculum, hoc est absurdum_; the decisions, therefore, of their taste and their disrelish:—they thereby lay a constraint upon many people, out of which there gradually grows a habituation for still more, and finally a _necessity for all_. The fact, however, that these individuals feel and "taste" differently, has usually its origin in a peculiarity of their mode of life, nourishment, or digestion, perhaps in a surplus or deficiency of the inorganic salts in their blood and brain, in short in their _physis_; they have, however, the courage to avow their physical constitution, and to lend an ear even to the most delicate tones of its requirements: their æsthetic and moral judgments are those "most delicate tones" of their _physis_. 40.