The Englishman introduces another function of omens in The Alchemist. He tells Santiago (whom he first mistakes for an Arab) that omens are not just for following on the way to achieving one's Personal Legend. They also can help a person understand the language of the universe.
Originally a waltz, during the British Dixieland Revival in the 1950s and 1960s this melody was often played in fast four/four tempo, notably recorded by the Kenny Ball Band. It's a Sin to Tell a Lie - Fats Waller | Song Info. AllMusic.
It is hard to believe that a man is telling the truth when you know that you would lie if you were in his place. ~Henry Louis Mencken, A Little Book in C Major, 1916. If you tell the truth you don't have to remember anything. ~Mark Twain, 1894. Who lies for you will lie against you. ~Bosnian Proverb.