The Lord gave His word to ancient Israel, that if they would cleave strictly to Him, and do all His requirements, He would keep them from all the diseases such as He had brought upon the Egyptians; but this promise was given on the condition of obedience. (CD p. 26.3)
The words spoken to Israel are true today of those who recover health of body or health of soul. "I am the Lord that health thee." Exodus 15:26
What is a definition of Disease?
Disease is an effort of nature to free the system from conditions that result from the violation of the laws of health. (MH p. 73)
What are the laws of health?
Pure air, sunlight, temperance, rest, exercise, proper diet, the use of water, trust in divine power--these are the true remedies. (MH p. 44)