Reprobate Mind - the mind tends to reduce a passage like this to its most palatable speck. Here we find as the diciple's minds were being opened up they were "astonished" frequently at Jesus's fuller revelations. Doesn't mean that they understood or agreed yet, only that they were seeing how deep things really were becoming.
Reprobate Mind - we see that at least in the case of divorce a legalized leniency was granted because of the hardness of mens hearts. Perhaps better stated as a civil protection for the offended party. God's better intention is that their softer hearts would not cause this course of action.
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