(1 Tim 4:4) “For every creature of God is good, and nothing to be refused, if it be received with thanksgiving: (5) For it is sanctified by the word of God and prayer.” Is the Word of God true? Yes, every word. Then, “…nothing to be refused, IF…..” it is prayed over. Therefore to not give thanks is not to have it sanctified, separated as holy for your body, and therefore no longer good for you. Do we eat without being thankful? Then it is no longer good for you.