Is Jesus talking about the laws concerning diet found in Leviticus 11 and Deuteronomy 14? We find our answer in the parallel account of this event in Matthew 15.
1. Then the scribes and Pharisees from Jerusalem came to Jesus, saying, 2. "Why do Your disciples transgress the tradition of the elders? For they do not wash their hands when they eat bread." 3. But He answered and said to them, "Why do you also transgress the commandment of God for the sake of your tradition?
Jesus and his disciples are criticized, by the Pharisees, regarding the CEREMONIAL washing of hands. This practice is not of God, nor did God command it. It is strictly a tradition of men, as Jesus stated, that religious leaders over the years falsely elevated to the status of being MORE IMPORTANT than the commandments and judgments of God.
"Hear, and understand. 11. That which goes into the mouth (a person's diet) does not defile the man; but that which comes out of his mouth, this defiles the man." (verses 10-11)
Jesus made his comments to the crowd in the context of discussing how human traditions can take the place of truly obeying the words of God. The physical, ritualistic traditions of men are, according to Christ, nowhere near as important as a person's character.
Did Peter's vision permit eating pork?
Another well-worn argument regarding the diet God approves of revolves around the vision God gave to Peter in Acts 10. In the vision Peter sees a sheet full of many animals whose flesh was "unclean" to eat (Acts 10:11-12). He is three times offered the opportunity to kill and eat the animals on the sheet. His response to God's offering is direct and to the point.
'In no way, Lord; for I have never eaten anything that is common or unclean' (verse 14)
God's response was that what He cleansed Peter ought not to call 'common.' Does this somehow entail a new ruling by God that what HE HIMSELF had designated as a proper diet for his creation was no longer valid and could be ignored? Was this rare vision given for the sole purpose of allowing church fellowships to have shrimp, pork and catfish at their potlucks? Such an interpretation would be ridiculous to Peter. He tells us, while talking to the first Gentile convert to Christianity, that the real meaning of vision had nothing to do with diet!
But GOD has shown me (e.g. I did not conclude this myself or have someone else tell me) that no MAN should be called common or unclean (verse 28)
In short, Peter's vision had NOTHING to do with changing God's commands regarding diet or with annulling ANYTHING in his law. The vision was not God's way of communicating a change in his will, rather, it was meant to change the biased and bigoted view of Peter regarding non-Jews!
Did Paul approve of an unclean diet?
16. Therefore, do not allow anyone to judge you in eating or in drinking, or with regard to a festival, or new moon, or the Sabbaths (Colossians 2:16)
Much of Christianity will tell you that the laws concerning clean and unclean meats, God's annual Feast Days, etc. were done away after the death of Christ. The Bible does not teach this. A review of church history shows that false teachings concerning the law, the change of Sabbath to Sunday, the change from Passover to Easter, and others were brought into the Church during the period from about 100 to 300 A.D.
The majority of believers in Colossae were, prior to their conversion, Gentiles and not Jews. They had not grown up learning about the law of God or trying to put in practice God's commandments like someone with a Jewish background. In their lives, they had eaten all kinds of unclean animals like pork in their diet. Paul was actually teaching the church to observe the laws of clean and unclean foods, to keep the Sabbath and so on!
There is absolutely no basis in the Bible for the teaching that God's laws of clean and unclean have been abolished and therefore can be ignored in the diet of a Christian. The distinction between what is clean and unclean will still be extant in the End Time when God judges Babylon (Revelation 18:2).
The Bible tells us God's laws will be upheld in the Millennium. When Christ returns to rule the earth to rule as King of Kings he will PUNISH those who disobey his Father's laws regarding what is a proper diet based on Leviticus 11 and Deuteronomy 14 (Isaiah 66:16-17). If the New Testament does not nullify God's health laws, and we know Jesus will enforce the same laws when he returns, it is therefore correct to conclude that such precepts are still in force TODAY.