How do we know that earthly riches are temporary?

In the parable of the rich fool described in Luke 12, the man had amassed great wealth but ultimately faced death without a relationship with God. Jesus warned that one's life does not consist in the abundance of possessions (Luke 12:15). This inconsistency shows that earthly riches, while providing temporary comfort, do not offer lasting security or are worth pursuing if they lead one away from God. The eternal riches found in Christ are far more valuable and secure than temporary wealth.