How happy can you be when you think every action and thought is being monitored by a judgmental ghost ?

If faith is a valid tool of knowledge, then anything can be true 'by faith,' and therefore nothing is true. If the only reason you can accept a claim is by faith, then you are admitting that the claim does not stand on its own merits.

If the answers to prayer are merely what God wills all along, then why pray?

It is a fact of history and of current events that human beings exaggerate, misinterpret, or wrongly remember events. They have also fabricated pious fraud. Most believers in a religion understand this when examining the claims of other religions.

Not thinking critically, I assumed that the successful prayers were proof that God answers prayer while the failures were proof that there was something wrong with me.

Even if it is true that all cultures share a common morality, why does this prove a supreme intelligence? After all, don't we humanists sometimes claim that there is a common thread of humanistic values running through history across cultural and religious lines?

Freethinkers reject faith as a valid tool of knowledge. Faith is the opposite of reason because reason imposes very strict limits on what can be true, and faith has no limits at all. A Great Escape into faith is no retreat to safety. It is nothing less than surrender.