The context of much of Matthew 5 deals with the assumed question, “How much can I get away with without actually breaking any rules?” Verses 21-26 dealt with hatred and murder. Verses 27-30 deal with lust and adultery. You could imagine a new convert to ancient Judaism asking his rabbi, “I have this neighbor, and his wife is smokin’ hot. Is there any law saying I can’t seduce her?” To this, a good rabbi would say, “Yes: You shall not commit adultery,” and leave it at that. A less-than-noble rabbi might say, “Technically, yes, that’s called adultery. But you know, the Bible doesn’t say anything about imagining what you would do if you could.” Jesus has something to say about the issue. He closes yet another loophole, but in doing so, it seems that more problems are created. Adultery is bad, yes we know. And Jesus equates “lust” with “adultery” in the same way he equated “hatred” with “murder.” But what is “lus...