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And though it be their sin and vanity that is the cause, it is nevertheless your sin to be the unnecessary occasion: for you must consider that you live among diseased souls. And you must not lay a stumblingblock in their way, nor blow up the fire of their lust, nor make your ornaments their snares; but you must walk among sinful persons, as you would do with a candle among straw or gunpowder; or else you may see the flame which you would not foresee, when it is too late to quench it.