Provided in Nature by Our Creator

“Leaves of the tree were for the healing of the nations.” Revelation 22:2

"God's miracles do not always bear the outward semblance of miracles. Often they are brought about in a way which looks like the natural course of events. When we pray for the sick, we also work for them. We answer our own prayers by using the remedies within our reach. Water, wisely applied, is a most powerful remedy. As it is used intelligently, favorable results are seen. God has given us intelligence, and He desires us to make the most of His health-giving blessings. We ask that God will give bread to the hungry; we are then to act as His helping hand in relieving hunger. We are to use every blessing God has placed within our reach for the deliverance of those in danger. 

Natural means, used in accordance with God's will, bring about supernatural results. We ask for a miracle, and the Lord directs the mind to some simple remedy."

— Letter 66, 1901, Ellen Gould White