"JESUS then called the people to HIM again and said to them, 'Listen to ME , all of you, and try to understand. Nothing that enters a person from the outside can make that person unclean. It is what comes from within that makes a person unclean. Let everyone who has ears listen.'
When JESUS got home and was away from the crowd, HIS disciples asked HIM about this saying, and HE replied, 'So even you are dull? Do you not see that whatever comes from outside cannot make a person unclean, since it enters not the heart but the stomach, and is finally passed out?'
Thus JESUS declared that all foods are clean.
And HE went on, 'What comes out of a person is what defiles him, for evil designs come out of the heart: theft, murder, adultery, jealousy, greed, maliciousness, deceit, indecency, slander, pride and folly. All these evil things come from within and make a person unclean.'" - Mark 7:14-23
(An important practice of Judaism was to keep oneself clean: one could not participate in worship without being in a state of ritual purity. This word "purity" did not have the same meaning we give it today. The clean person was one who was not contaminated even inadvertently by things prohibited by law. For example, pork and rabbit were considered unclean; they could not be eaten. A menstruating woman or a person with hemorrhoids were considered unclean for a certain number of days: no one could even touch them. A leper was considered unclean until cured. If a bug fell in oil, the oil was considered unclean, and would have to be thrown away.
If contaminated even by no fault of his own, the person had to purify himself, usually with water, sometimes paying for sacrifices.
At one time, these laws were useful in encouraging a hygienic life-style. They also protected the faith of the Jews who lived among people who did not know GOD. How could they guard their faith in the one GOD if they were to live with other nations, befriend them, and even imitate their ways? With so many religious practices to observe, the Jews had to live apart from those who did not share their faith and life-style.
JESUS removes off from these rites their sacred value: nothing is unclean in all GOD's creation; touching the sick, a corpse or a bloodstained object does not offend GOD. GOD is not bothered if we eat this or that. Sin is always something that comes from the heart and not something we do unintentionally.
It is true that Scripture teaches these concepts of purity and impurity, but these laws were written many centuries ago and not everything Scripture says is valid for all times. Through the teachings of the Scriptures GOD educated HIS nation, but the laws HE gave them from the beginning, when they were barbaric and uneducated, are no longer necessary for a community which has a solid religious foundation.
It is quite legitimate for Christians to adopt a vegetarian way of life, that Christian communities consider abstinence from alcohol and tobacco as a witness to help addicts. But let us not say that this is part of our faith nor let us judge those who do not agree with us. That would otherwise undermine the transcendence of Christian salvation that goes beyond any question of "eating and drinking" [Romans14:17].)
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