Missing "r"
The Pope dies and, naturally, goes to heaven. He's met by the
reception committee, and after a whirlwind tour he is told that he can
enjoy any of the myriad of recreations available.
He decides that he wants to read all of the ancient original text of
the Holy Scriptures, so he spends the next eon or so learning
languages.
After becoming a linguistic master, he sits down in the
library and begins to pour over every version of the Bible, working
back from most recent "Easy Reading" to the original script.
All of a sudden there is a scream in the library. The Angels come
running in only to find the Pope huddled in his chair, crying to
himself and muttering, "An 'R'! The scribes left out the 'R'." A
particularly concerned Angel takes him aside, offering comfort, asks
him what the problem is and what does he mean.
After collecting his wits, the Pope sobs again, "It's the letter 'R'.
They left out the 'R'. The word was supposed to be - CELEBRATE!"