House of correction

"Hatred is a natural feeling, which makes us defend ourselves, against people or species of people who are harmful to us, - unless we have scientific knowledge in psychology and natural science. (He who understands everything does not feel hatred even for his enemy.) It is certainly an unpleasant feeling, and, if manifested in another, it is odious. If, therefore, you do not have the aptitude to bear such a feeling calmly, at least do not talk about it, or say the exact opposite of what you feel. And then you speak in the language of angels."