Those who indulge in meat eating, tea drinking, and gluttony are sowing seeds for a harvest of pain and death. The unhealthful food placed in the stomach strengthens the appetites that war against the soul, developing the lower propensities. A diet of flesh meat tends to develop animalism. A development of animalism lessens spirituality, rendering the mind incapable of understanding truth. CH 575.4
The word of God plainly warns us that unless we abstain from fleshly lusts, the physical nature will be brought into conflict with the spiritual nature. Lustful eating wars against health and peace. Thus a warfare is instituted between the higher and the lower attributes of the man. The lower propensities, strong and active, oppress the soul. The highest interests of the being are imperiled by the indulgence of appetites unsanctioned by Heaven. CH 576.1
Great care should be taken to form right habits of eating and drinking. The food eaten should be that which will make the best blood. The delicate organs of digestion should be respected. God requires us, by being temperate in all things, to act our part toward keeping ourselves in health. He cannot enlighten the mind of a man who makes a cesspool of his stomach. He does not hear the prayers of those who are walking in the light of the sparks of their own kindling. CH 576.2