Morris says that people use material things tho make themselves content. What do these people do when they discover that their new materials are empty?

Morrie says that the more you invest in money for happiness, the more miserable you will be:

These were people so hungry for love that they were accepting substitutes. They were embracing material things and expecting a sort of hug back. But it never works. You can't substitute material things for love or for gentleness or for tenderness or for a sense of comradeship.