It's true, think about it.
If you eat one cheeseburger, it is good.
Then you eat a second, and it is only half as satisfying as the first.
Finally when you try to eat a third you realize you never want a cheesburger again.
With money, it's a little more of an elusive concept to ponder on, but the point is that at some point the sparkle of materialistic distractions becomes incapable of distracting the emptiness of a person without purpose.
Money is great, but I've always been more into people and freedom.