there is more to life than just meeting physical needs or pursuing material gain
—I know that your business classes will help you get a good job, but you should learn about art and music, too. Man doesn’t live by bread alone.

As Jesus began his ministry, he fasted for 40 days. He was hungry, and Satan tried to tempt him to turn away from God’s plan:

The tempter came and said to him, “If you are the Son of God, command these stones to become bread.” But he answered, “It is written, ‘Man does not live by bread alone [Man shall not live by bread alone], but by every word that comes from the mouth of God.’” (Matthew 4:3,4)

Jesus was using the words of Moses, when he had talked with the Israelites about how God had tested them during their 40 years in the wilderness:

So he humbled you by making you hungry and then feeding you with unfamiliar manna. He did this to teach you that humankind cannot live by bread alone [man doth not live by bread only], but also by everything that comes from the Lord’s mouth. (Deuteronomy 8:3)