Yokes

Middlemarch, book 5, chapter 48:

When Dorothea was out on the gravel walks, she lingered among the nearer clumps of trees, hesitating, as she had done once before, though from a different cause.  Then she had feared lest her effort at fellowship should be unwelcome; now she dreaded going to the spot where she foresaw that she must bind herself to a fellowship from which she shrank.  Neither law nor the world's opinion compelled her to this - only her husband's nature and her own compassion, only the ideal and not the real yoke of marriage.  She saw clearly enough the whole situation, yet she was fettered: she could not smite the stricken soul that entreated hers.