He humbled you ... in order to make you understand that one does not live by bread alone, but by every word that comes from the mouth of the Lord. Deuteronomy 8:3, NRSV.
The duel between Christ and Satan was fought in the wilderness, Christ with apparently not a friend to aid Him. Satan was subtle; falsehood is his stock in trade. With all the power that he possessed he tried to overcome the humanity of Christ....
Satan charmed the first Adam by his sophistry, just as he charms men and women today, leading them to believe a lie. Adam did not reach above his humanity for divine power; he believed the words of Satan. But the second Adam was not to become the enemy's bond slave.
Adam had the advantage over Christ in that, when he was assailed by the tempter, none of the effects of sin were upon him. He stood in the strength of perfect manhood, possessing the full vigor of mind and body. He was surrounded with the glories of Eden and was in daily communion with heavenly beings. It was not thus with Jesus when He entered the wilderness to cope with Satan....
Every device that the enemy could suggest was brought against Him. It was when Christ was in a weakened condition, after His long fast of forty days, that the wisest of the fallen angels used the most enticing words at his command in an effort to compel the mind of Christ to yield to his mind.... “If thou be the Son of God,” he said, “show thy power by relieving thyself of this pressing hunger.”“Command that these stones be made bread.” ...
When Christ said to Satan, “Man shall not live by bread alone, but by every word that proceedeth out of the mouth of God,” He repeated the words that, more than fourteen hundred years before, He had spoken to Israel. [Deuteronomy 8:3, quoted].
In the wilderness, when all means of sustenance failed, God sent His people manna from heaven; and a sufficient and constant supply was given. This provision was to teach them that while they trusted in God and walked in His ways, He would not forsake them. The Saviour now practiced the lesson He had taught to Israel. By the word of God succor had been given to the Hebrew host, and by the same word it would be given to Jesus. He awaited God's time to bring relief. He was in the wilderness in obedience to God, and He would not obtain food by following the suggestions of Satan. In the presence of the witnessing universe, He testified that it is a lesser calamity to suffer whatever may befall than to depart in any manner from the will of God.—Manuscript 113, 1902.
From Christ Triumphant - Page 217
Christ Triumphant