DON'T PANIC

"In many of the more relaxed civilizations on the Outer Easter Rim of the Galaxy, the Hitchhiker's Guide has already supplanted the great Encyclopedia Galactica as the standard repository of all knowledge and wisdom, for though it has many omissions and contains much that is apocryphal, or at least wildly inaccurate, it scores over the older, more pedestrian work in two important respects.
First, it is slightly cheaper, and second, it has the words 'DON'T PANIC' inscribed in large friendly letters on its cover."


Adams, Douglas (1979). The Hitchhiker's Guide to the Galaxy