Read the whole chapter from verses 1 to 23. This instruction of Jesus to the Jews had absolutely nothing to do with the distinction between foods clean and unclean. That was not a question which was raised at all as between classes of animals which had been by the Lord from the very beginning classed as clean and unclean. The whole question was as to eating with unwashed hands. The Pharisees claimed that unless one went through certain ablutions and forms, it made the food unclean. The disciples of Jesus had eaten their bread with hands "defiled," as the Pharisees called it, and therefore they were eating unclean food. The whole question was aroused over this. And Jesus goes on to tell them that it was not the matter of eating the food that counted, nor the food they ate, but what was within the man. All evil in the man proceeds from the heart. God would regenerate the evil heart and dwell there Himself, so as to control all its desires and appetites. A man controlled by the Spirit of God would desire to eat only that which would be best food for him for the Lord's service; in other words, he would eat and drink to the glory of God. 1 Cor. 10:31. A well-instructed Christian would want to use only those things which the Lord has said are good for food, and the Word of God has classed among the unclean animals the swine. Science has placed it among the most undesirable foods, that which is among the first prohibited to the sick. The commonest sort of investigations have shown it to be the most diseased food furnished among flesh foods, and the investigations of the slaughter-houses complete the picture and place it among the most abominable of things which the perverted and voracious appetite of man crams into the poor diseased stomach. The very word scrofula comes from the same root as sow, a female swine; and the very disease comes from feeding on the swine; and there is no question but what this kind of diet helps to prepare many for the ravages of the dread white plague, tuberculosis. It seems to us that two reasons above all others ought to govern every Christian, namely, swine's flesh is among the very worst of foods, and there is an abundance of better things on every side.