Excerpt from Letters to Felice, by Franz Kafka

Now consider, Felice, the change that marriage would bring about for us, what each would lose and each would gain. I should lose my (for the most part) terrible loneliness, and you, whom I love above all others, would be my gain. Whereas you would lose the life you have lived hitherto, with which you were almost completely satisfied. You would lose Berlin, the office you enjoy, your girl friends, the small pleasures of life, the prospect of marrying a decent, cheerful, healthy man, of having beautiful, healthy children for whom, if you think about it, you clearly long. In the place of these incalculable losses, you would gain a sick, weak, unsociable, taciturn, gloomy, stiff, almost hopeless man who possibly has but one virtue, which is that he loves you. Instead of sacrificing yourself for real children, which would be in accordance with your nature as a healthy girl, you would have to sacrifice yourself for this man who is childish, but childish in the worst sense, and who at best might learn from you, letter by letter, the ways of human speech. Any you would lose in all the small things, all of them.