The sentence "The quick brown fox jumps over the lazy dog." uses every letter in the alphabet and was developed by Western Union to test telex/twx communications.

“Don’t say you don’t have enough time. You have exactly the same number of hours per day that were given to Helen Keller, Pasteur, Michaelangelo, Mother Teresea, Leonardo da Vinci, Thomas Jefferson, and Albert Einstein.” – Life’s Little Instruction Book, compiled by H. Jackson Brown, Jr.