Measure for Measure Lesson Plan

What does Isabella mean when she says "'Tis set down so in heaven, but not in Earth" (2.4.52)?

Isabella is responding to Angelo's claim that murder and fornication are equally sinful in the eyes of God. While agreeing with him, she makes clear that she knows that this is not the case on Earth. What she is referring to is not the law (as the law has essentially equated these), but the social order of Vienna that women live under. For Isabella, the loss of her virginity would be a fate worse than death, as it would destroy all her prospects. Though she does remain focused on saying that her brother's life is not worth this sin (a more celestial concern), she is...