No, I was making a reference to the Litany of Tarski.
When you ask "how do I forget rationality?", it seems to me that you're asking how to go back to deceiving yourself. After all, rationality is the adherence of beliefs to reality, and there's nothing that subtracts you joy by changing your beliefs so that they are more in tune with reality: after all, reality was there all along.
Perhaps ponderating on the joy of the merely real could help.
"Reality was there all along." The fact that someone believes something is part of reality, and if it changes, then reality is changing. There is no reason that this cannot take away some joy from someone, even if their beliefs end up less accurate.
As St. Paul said, "For in passing judgment on another you condemn yourself, because you, the judge, practice the very same things." Asserting that conforming your beliefs to reality cannot make you less joyful is itself a form of wishful thinking in which you refuse to conform your beliefs to reality.
If it's worth saying, but not worth its own post, then it goes here.
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