George Eliot said this quote

I suppose it was that in courtship everything is regarded as provisional and preliminary, and the smallest sample of virtue or accomplishment is taken to guarantee delightful stores which the broad leisure of marriage will reveal. But the door-sill of marriage once crossed, expectation is concentrated on the present. Having once embarked on your marital voyage, it is impossible not to be aware that you make no way and that the sea is not within sight—that, in fact, you are exploring an enclosed basin.