For from the heart come evil thoughts, murder, adultery, fornication, theft, lying and slander. These are what defile; but there is no spiritual defilement from eating without first going through the ritual of ceremonial handwashing! (Matthew 15:19-20 , tlb)
Spiritual health is more important than physical health. We work hard to keep our outward appearance attractive, but what is in our hearts is even more important. The way we are deep down (where others can’t see) matters much to God. What are you like inside? When people become Christians, God makes them different on the inside. He will continue the process of change inside them if they only ask. God wants us to have healthy thoughts and motives, not just healthy food and exercise.
Neil S. Wilson