How we cite our quotes:
"I wonder at the parents! They say it's a marriage for love."
"For love? What antediluvian notions you have! Can one talk of love in these days?" said the ambassador's wife.
"What's to be done? It's a foolish old fashion that's kept up still," said Vronsky.
"So much the worse for those who keep up the fashion. The only happy marriages I know are marriages of prudence." (2.7.10-13)
In Russian society depicted here, people often choose not to marry for societal position and wealth rather than love. Anna seems to be among this number. The society members here are of the opinion that the best marriages are not ones created on the basis of love. However, Tolstoy seems to be of the opposite opinion. The happiest marriage we see in the novel is the loving marriage between Levin and Kitty, which stands in stark contrast to Anna's "prudent" marriage to Karenin.
He was angry with all of them for their interference just because he felt in his soul that they, all these people, were right. He felt that the love that bound him to Anna was not a momentary impulse, which would pass, as worldly intrigues do pass, leaving no other traces in the life of either but pleasant or unpleasant memories. He felt all the torture of his own and her position, all the difficulty there was for them, conspicuous as they were in the eye of all the world, in concealing their love, in lying and deceiving; and in lying, deceiving, feigning, and continually thinking of others, when the passion that united them was so intense that they were both oblivious of everything else but their love. (2.21.34)
Even though the world is against their affair, Vronsky believes that all he and Anna need is their love for each other. Over the course of the novel, we see how he underestimated the impact social isolation could have on Anna.
Levin looked more attentively at Ivan Parmenov and his wife. They were loading a haycock onto the cart not far from him. Ivan Parmenov was standing on the cart, taking, laying in place, and stamping down the huge bundles of hay, which his pretty young wife deftly handed up to him, at first in armfuls, and then on the pitchfork. The young wife worked easily, merrily, and dexterously. The close-packed hay did not once break away off her fork. First she gathered it together, stuck the fork into it, then with a rapid, supple movement leaned the whole weight of her body on it, and at once with a bend of her back under the red belt she drew herself up, and arching her full bosom under the white smock, with a smart turn swung the fork in her arms, and flung the bundle of hay high onto the cart. Ivan, obviously doing his best to save her every minute of unnecessary labor, made haste, opening his arms to clutch the bundle and lay it in the cart. As she raked together what was left of the hay, the young wife shook off the bits of hay that had fallen on her neck, and straightening the red kerchief that had dropped forward over her white brow, not browned like her face by the sun, she crept under the cart to tie up the load. Ivan directed her how to fasten the cord to the cross-piece, and at something she said he laughed aloud. In the expressions of both faces was to be seen vigorous, young, freshly awakened love. (3.11.15)
For Levin, the ideal of love he observes in the peasant couple is not passion alone but shared work.