To demonstrate this principle in many of my classes, I share the example of a photo with two little boys.
On the top is a picture of a little boy holding one slice of cake and beaming with joy.
When you examine this scenario, you recognize that the boy who is sad actually has much more cake than the boy who is happy. How?
The boy on the bottom is focused on what is *missing*, so he is sad.
When we focus on our blessings, they enlarge and we feel rich and content. And happy.
When we focus on what's missing in our lives, problems, negativity, we feel poor--no matter how much we actually have.