This image has a powerful message. As you can see, the boy on the left has many, many toys that surround him. There is even a television in the background, and he is wearing a nice, clean shirt. Yet, he is still upset. Despite all the entertainment around him, the boy cries and screams in anger and sadness. The boy on the right, however, only has a single toy car, and is wearing tattered clothing. In the background, only a tiny hut is visible. Despite not seeming to have much, the boy is smiling and playing with his toys.
The quote above contributes to the idea that some people will be unsatisfied with something that another will be extremely happy with. It depends on what value you raise something to.