"Arithmetic arithmetock Turn the hands back on the clock How does the ocean rock the boat? How did the razor find my throat? The only strings that hold me here Are tangled up around the pier."

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As regards authority I so proceed. Boetius says in the second prologue to his Arithmetic, 'If an inquirer lacks the four parts of mathematics, he has very little ability to discover truth.' And again, 'Without this theory no one can have a correct insight into truth.' And he says also, 'I warn the man who spurns these paths of knowledge that he cannot philosophize correctly.' And Again, 'It is clear that whosoever passes these by, has lost the knowledge of all learning.'

— Roger Bacon