1BT 1 Cor. 10:31. Christians are commanded to eat and drink as will please God. The only way that we can eat and drink that will be pleasing to God, is to be governed in his eating and drinking by the principles of the Bible, and not merely by appetite or taste.
2BT Isa. 55:2. God has commanded us to eat only that which is good, and we learn what is truly good to eat by the teachings of His Word.
3BT Gen 1:29,31. The God who made man knows what is best for man to eat, and the original diet which God ordained for man was fruits, grains, and nuts.
God did not permit man to eat the flesh of animals until the time of the Flood. To Israel in the wilderness He made it very plain that man is not to eat the flesh of any unclean animal, fowl, or fish.
4BT Deut. 14:7,8. God told His people not to eat the flesh of swine.
5BT Deut. 14:9,10. Creatures in the waters which do not have fins and scales are not to be eaten. God's people should not eat catfish, eels, crabs, lobsters, oysters, or clams. This instruction cannot be set aside by Christians today on the ground that it is in the Mosaic law, which has passed away. This prohibition against eating unclean creatures was in force centuries before the Mosaic law was given (read Gen. 7:2), and this uncleanness is still recognized in the last book of the Bible, long after the ceremonial law had passed at the cross. (Read Rev. 18:2).
6BT Isa. 66:15-17. When the Lord Jesus comes, those who are found eating swine's flesh will be consumed by the fire of His presence, along with those who eat mice. God is love; He never deprives us of anything that is for your good. So when He tells us not to eat unclean creatures, it is for our good to obey.
7BT Deut. 14:2,3. God's people are to be a holy and pure people; they are not to eat any unclean or abominable thing. Lev. 20:25,26.
8BT Prov. 23:29-32. There is plain instruction in the Bible against the use of alcoholic liquors. 1 Cor. 6:9,10. This means that when we drink as will please God, we will not drink beer, wine, whiskey, gin or any alcoholic liquor. Coffee contains a poison known as caffeine, which is injurious to the body. Tea contains two poisons, known as tannin and theine, which are injurious to the body. Cola drinks also contains injurious poisons. Tobacco, snuff, and cigars contain a deadly poison known as nicotine, which is injurious to the body. Cigarettes contain nicotine and another poison known as furfurol. When we really eat and drink as is pleasing to God, as Scripture commands us, we will lay aside tea, coffee, cola drinks, and tobacco, or any narcotic habit, such as the morphine habit, etc.
9BT 1 Cor 6:19,20. Our body is the temple of the Holy Spirit, and is to be kept clean from these harmful things, so it will be a fit place for the indwelling of Jesus by His Holy Spirit. 2 Cor. 6:17,18; 7:1.
10BT 1 Cor. 3:17. If we defile the body temple with these unclean and harmful things, God will destroy us. True Christian temperance is a total abstinence from all that is harmful and a moderate use of that which is good.
11BT 1 John 3:2,3. If we really have the true hope in Christ of being made like Him when He comes, we will purify ourselves now, even as Jesus is pure. Jesus never ate pork or any unclean creature. He would not use tobacco, tea, coffee, coca cola, opium, morphine, etc. And if we purify ourselves as He is pure, we will leave off all these things. This is a part of the process of getting ready to meet Jesus at His coming and being prepared for an eternal home in the new earth.
See also the topics The Apostle Peter's Vision and The Frontal Lobe and Spirituality.