Staying healthy biblically is by caring and protecting ourselves from sin because God hates sin. The Bible teaches that our bodies are temples of the Holy Spirit, so maintaining good health enables us to serve God and others more effectively.
"Do you not know that your bodies are temples of the Holy Spirit, who is in you, whom you have received from God?" (1 Corinthians 6:19).
Our spiritual health is also important because when we are healthy spiritually, things get easier for us. A healthy relationship with God through prayer, obedience, and living according to His word brings peace, wisdom, and strength to face life's challenges. While sickness may still come, believers are encouraged to trust God, practice moderation, and live in ways that honor Him both physically and spiritually.