The Bible
Preparing for a long trip, a traveler said to his friend: "I am just about packed. I only have to put in a guidebook, a lamp, a mirror, a microscope, a telescope, a volume of fine poetry, a few biographies, a package of old letters, a book of songs, a sword, a hammer and a set of books I have been studying."
"But," the friend replied, "you can't get all that into your bag."
"Oh, yes," replied the traveler, "it doesn't take much room." He placed his Bible in the corner of the suitcase and closed the lid.
From Bruce & Stan's Guide to the Bible