Because gratitude is the key to happiness, anything that undermines gratitude must undermine happiness. And nothing undermines gratitude as much as expectations. There is an inverse relationship between expectations and gratitude: The more expectations you have, the less gratitude you will have.
The more that you expect, the less happy you will be-- because if the expectations are realized you won't be grateful
Those of us have minimized expectations walk around with a greater sense of thankfulness (because so many wonderful things that we didn't expect come our way each day).
Expectations can ruin your chances for happiness
