The Pope dies and, naturally, goes to heaven. 

He's met by the reception committee, and after a whirlwind tour is
told that he can enjoy any of the myriad recreations available. 
He decides that he wants to read all of the ancient original text 
of the Holy Scriptures, and spends the next eon or so learning the 
languages. After becoming a linguistic master, he sits down in the 
library and begins to pore over every  version of the Bible, working 
back from the most recent "Easy Reading" to the original script.

All of a sudden there is a scream in the library. 

The angels come running to him, only to find the Pope huddled in a
chair, crying to himself, and muttering, "An 'R'!  They left out the 'R'." 
God takes  him aside, offering comfort and asks him what the problem is.
After collecting his wits, the Pope sobs again,
"It's the letter 'R' ... the word  was supposed to be CELEBRATE!"