The Bible presents the body as belonging to God and calls believers to honor Him in every part of life. Caring for health is not a way to earn salvation; it is a grateful response to God's desire to restore the whole person.
Because the body is described as a temple of the Holy Spirit, Scripture calls believers to care for it wisely — through rest, nourishing food, physical activity, and avoiding what harms the body or clouds the mind. This is never framed as a way to earn God's favor; it is a grateful, practical response to being bought at a price and belonging fully to God. Healthy choices also support a clear mind for prayer, service, and discernment, reflecting God's desire to restore the whole person — body, mind, and spirit — rather than treating physical health as separate from spiritual life.
People are an inseparable unity of body, mind, and spirit. Rest, exercise, wholesome food, temperance, avoiding addictive substances, and care for mental health are invitations to greater usefulness and joy, not tests by which God decides who is worthy of salvation.