Satan’s temptations are intended to cause Jesus to act independently of God the Father. As Jesus resists each temptation, He quotes from Deuteronomy 8, relating His own experience of 40 days in the wilderness to the experience of Israel after they escaped Egypt. When Moses speaks to the Israelites in that passage, they are preparing to finally enter the Promised Land.
As with all members of the human race, Christ also needed food to maintain His physical human body. In His life, however, obedience to His Heavenly Father's will and words was His highest priority. It is true that He was fully God and able to turn stones into bread, but to do so would have meant acting independently of God, as Adam did in the Garden of Eden. This would have disqualified Him from God's plans and purposes.
Although Jesus was fully God, He lived His life as fully human in obedience to the words and wills of His Father. The life of Jesus is the perfect example of how God expects all His blood-bought children to live - obedience to Him and complete dependence on Him.

Dear Heavenly Father, Your Son set an amazing example when He sacrificed His rights and abilities to obey Your commands. Let me resist the temptation to act independently of You and keep my eyes on Christ's earthly example. May I always rely on You in every circumstance in my life, knowing that it is Your will for me to do so and that doing so brings honor to You.
In Jesus's name I pray. Amen.