Here, on a human face, appeared all the ruin following upon hopeless labour. Laveuve's unkempt beard straggled over his features, suggesting an old h… - Émile Zola

The certainty of having her as his wife prevented him from feeling any desire for her.

Oh, that’s typical of you modern young men; you’ve nibbled at science and it’s made you ill, because you’ve not been able to satisfy that old craving for the absolute that you absorbed in your nurseries. You’d like science to give you all the answers at one go, whereas we’re only just beginning to understand it, and it’ll probably never be anything but an eternal quest. And so you repudiate science, you fall back on religion, and religion won’t have you any more. Then you relapse into pessimism... Yes, it’s the disease of our age, of the end of the century: you’re all inverted Werthers.

He would have given up everything -- education, comfort, luxurious life and his powerful position as manager -- if only just for one day he could have been the humblest of these poor devils under him and be free with his own body and be oafish enough to beat his wife and take his pleasure with the wives of his neighbors. He found himself wishing he were dying of starvation too, and that his empty belly were twisted with pains that made his brain reel, for perhaps that might deaden this relentless grief! Oh to live like a brute, possessing nothing but freedom to roam in the cornfields with the ugliest and most revolting haulage girl and possess her!