Now when they came to Marah, they could not drink the waters of Marah, for they were bitter. Therefore the name of it was called Marah. And the people complained against Moses, saying, “What shall we drink?” Exodus 15:23, 24, NKJV.
The Lord had a lesson to teach the children of Israel. The waters of Marah were an object lesson, representing the diseases brought upon human beings because of sin. It is no mystery that the inhabitants of the earth are suffering from disease of every stripe and type. It is because they transgress the law of God.
Thus did the children of Israel. They broke down the barriers which God in His providence had erected to preserve them from disease, that they might live in health and holiness, and so learn obedience in their journeyings through the wilderness. They journeyed under the special direction of Christ, who had given Himself as a sacrifice to preserve a people who would ever keep God in their remembrance, notwithstanding Satan's masterly temptations. Enshrouded in the pillar of cloud, it was Christ's desire to keep under His sheltering wing of preservation all who would do His will.
It was not by chance that in their journey the children of Israel came to Marah. Before they left Egypt the Lord began His lessons of instruction, that He might lead them to realize that He was their God, their Deliverer, their Protector. They murmured against Moses and against God, but still the Lord sought to show them that He would relieve all their perplexities if they would look to Him. The evils they met and passed through were part of God's great plan, whereby He desired to prove them.
When they came to the waters of Marah, “the people murmured against Moses, saying, What shall we drink? And he cried unto the Lord; and the Lord shewed him a tree, which when he had cast into the waters, the waters were made sweet: there he made for them a statute and an ordinance, and there he proved them.” ... Though invisible to human eyes, God was the leader of the Israelites, their mighty Healer. He it was who put into the tree the properties which sweetened the waters. Thus He desired to show them that by His power He could cure the evils of the human heart.
Christ is the great Physician, not only of the body, but of the soul. He restores us to our God. God permitted His only begotten Son to be bruised, that healing properties might flow forth from Him to cure all our diseases.—Manuscript Releases 15:29-31.
From To Be Like Jesus - Page 309
To Be Like Jesus