"It is enough", this malicious man tells us, "to extinguish the line of the defeated prince." Can one read this without quivering in horror and indig… - Frederick II of Prussia

Avec toute l’algèbre du monde on n’est souvent qu’un sot lorsqu’on ne sait pas autre chose. Peut-être dans dix ans la société tirera-t-elle de l’avantage des courbes que des songe-creux d’algébristes auront carrées laborieusement. J’en félicite d’avance la postérité; mais, à vous parler vrai, je ne vois dans tous ces calculs qu’une scientifique extravagance. Tout ce qui n’est ni utile ni agréable ne vaut rien. Quant aux choses utiles, elles sont toutes trouvées; et, pour les agréables, j’espère que le bon goût n’y admettra point d’algèbre.

(About the battle of Kunersdorf) "I shall not survive this cruel misfortune. The consequences will be worse than defeat itself. I have no resources left, and, to speak quite frankly I believe everything is lost. I shall not outlive the downfall of my country. Farewell, forever!"

The cruel man is of misanthropic temperament, and is a man of moods, oscillating from quiet brooding to sudden explosions. If a man like this does not fight this unhappy provision of his soul during his youth, under no circumstances could he avoid becoming furious - and foolish. There are those who would leave it up to God, but to ensure justice on the earth, and not fob it off to the Divinity, it is mandatory that people know both virtue and its benefits, since the virtues lead to unity among them, not the war of all against all. Therefore, it is absolutely necessary to conserve them, and show that crime can only return misfortunes and destruction, including of the criminal himself. Who is the last victim of his crimes.