A man will fall in love with some beauty, with a woman's body, or even with a part of a woman's body (a sensualist can understand that) , and he'll abandon his own children for her, sell his father and mother, and his country, Russia, too. If he's honest, he'll steal; if he's humane, he'll murder; if he's faithful, he'll deceive.
 Fyodor Dostoyevsky, The Brothers Karamazov (1880). copy citation

Context

“said Alyosha, with a sort of shudder. “Grushenka? No, brother, he doesn't despise her. Since he has openly abandoned his betrothed for her, he doesn't despise her. There's something here, my dear boy, that you don't understand yet. A man will fall in love with some beauty, with a woman's body, or even with a part of a woman's body (a sensualist can understand that) , and he'll abandon his own children for her, sell his father and mother, and his country, Russia, too. If he's honest, he'll steal; if he's humane, he'll murder; if he's faithful, he'll deceive. Pushkin, the poet of women's feet, sung of their feet in his verse. Others don't sing their praises, but they can't look at their feet without a thrill—and it's not only their feet. Contempt's no help here, brother, even if he did despise Grushenka.” source