It was in the barren wilderness that Israel learned to trust God for supernatural provision. Whether it was the initial wilderness journey preparing them to enter the promised land, or the forty-year trek experienced as chastisement for their rebellion--God provided for them.
The Word records that their clothes did not wear out, nor did their feet outgrow their shoes during all those years (Deuteronomy 8:4). God prepared a table for them in the wilderness (Psalm 78:19), providing both water and manna for food (Exodus 16:32).
Yet thou in thy manifold mercies forsookest them not in the wilderness : the pillar of the cloud departed not from them by day, to lead them in the way; neither the pillar of fire by night, to shew them light, and the way wherein they should go. Thou gavest also thy good spirit to instruct them, and withheldest not thy manna from their mouth, and gavest them water for their thirst. Yea, forty years didst thou sustain them in the wilderness , so that they lacked nothing; their clothes waxed not old, and their feet swelled not. (Nehemiah 9:19-21)
While they were in the wilderness, God provided all they needed--not the demands of their fleshly lusts, but what they needed. The same is true in your spiritual wilderness. God will provide spiritual food and water. In the wilderness, you will learn the difference between what you need and what you want. God promises provision of your needs, not every lustful want (Philippians 4:19).
In the New Testament record, we also find Jesus with a multitude of hungry people in the wilderness:
And his disciples say unto him, Whence should we have so much bread in the wilderness, as to fill so great a multitude? And Jesus saith unto them, How many loaves have ye? And they said, Seven, and a few little fishes. And he commanded the multitude to sit down on the ground. And he took the seven loaves and the fishes, and gave thanks, and brake them, and gave to his disciples, and the disciples to the multitude. And they did all eat, and were filled: and they took up of the broken meat that was left seven baskets full. And they that did eat were four thousand men, beside women and children.
In the wilderness, you recognize just how needy you are spiritually. Your resources--your loaves and fish--are not enough. This kind of need is good, for as He did in the natural world, the Lord will do likewise in the spiritual desert of your life. He will meet your needs, It is good to be a needy person spiritually because Jesus said: "Blessed are they which do hunger and thirst after righteousness: for they shall be filled" (Matthew 5:6).