This old adage is illustrated. The idea is that no amount of money or other external things can guarantee a person's happiness.

Examples:
In "Citizen Kane" (1941), we see how the exceedingly rich and powerful Mr. Kane dies miserable without friends while reminiscing on the last time, perhaps, that he was truly happy: when he was eight and had a sled named "Rosebud".

Aliases:
material things don't make you happy

References:
https://en.wiktionary.org/wiki/money_can%27t_buy_happiness