The Magic Inkblot
This is a magic inkblot that always tells the truth. The answer to every question imaginable is in this inkblot. Now many people will stare at this magic inkblot, but not everyone will see the answers. In fact, most everyone will get different answers. Sometimes, you will see the truth and sometimes you will not -- again, not because of the magic inkblot, but because of you. Every time the truth is confirmed by the magic inkblot, you should acknowledge the magic of the inkblot. Every time you get what appears to be the wrong answer from the inkblot, keep in mind that there is either a deeper truth that has been uncovered, a hidden lesson, or perhaps you just misinterpreted the answer -- and acknowledge the magic of the inkblot.
This magic inkblot can even cure cancer.*

I know what you skeptics are thinking -- that this is just an ordinary inkblot, and the "truths" we get from the inkblot really are just projections of what we already believe. You are thinking that we remember the "wins" and attempt to justify the losses. You are wondering how this inkblot is any different from the countless other inkblots throughout history and cultures. Well, the inkblot does not work on skeptical minds. You need to first believe with all your heart that this inkblot is magic, and only then will you experience the magic of the inkblot.
(BTW - It works best when you are in a highly-emotional state, extremely vulnerable, or just very gullible.)
* This has not been empirically tested or verified. The success rate of the magic inkblot's ability to cure cancer depends on the strength of your faith in the magic inkblot, the type of cancer, the stage of cancer, and how much doctors and modern medicine has assisted in the treatment -- mostly the latter three.

