Exodus 15:26 (NIV) He said, "If you listen carefully to the voice of the LORD your God and do what is right in his eyes, if you pay attention to his commands and keep all his decrees, I will not bring on you any of the diseases I brought on the Egyptians, for I am the LORD, who heals you."
Proverbs 17:22 (NIV) A cheerful heart is good medicine, but a crushed spirit dries up the bones.
Matthew 15:28 (NIV) Then Jesus answered, "Woman, you have great faith! Your request is granted." And her daughter was healed from that very hour.
God is often (in some sense) nearer to us, and more effectually present with us, in sickness than in health... He often sends diseases of the body to cure those of the soul. Comfort yourself with the sovereign Physician of both the soul and the body.—Brother Lawrence