Disappointment, Root of All Unhappiness

Disappointment is your thought that
God doesn't know what God is doing.
- Neale Donald Walsch

There is a continuum of belief in an omnipotent and benevolent God that runs from "absolutely," through "I hope so," and "maybe," to "absolutely not." [There are also many - such as my wonderful Hindu friends -  who believe in a God or Gods that are not omnipotent, not benevolent, or both, but that is a subject for another day.]

Those who have unswerving faith in an omnipotent and benevolent God can never be disappointed, and are quite likely the happiest among us. Whatever happens in the world or in one's personal life can be regarded as the blessed work of God. If something appears unjust or unfair or evil or immoral, the response of a person of true faith, is not disappointment, but praise: "Clearly, what is happening is good, because it is the work of my omnipotent and benevolent God. If His work appears to my eyes to be flawed, the fault lies with my eyes. I  pray that I may see all God's works as good."

At the opposite end of the spectrum, one who is quite sure the God is a figment of the human imagination can certainly never be disappointed by any expectations of God.