" I am not sure,' Mordecai told Thomas, 'whether omens can be trusted.'
'Of course they can.'
'I should like to hear your reasons. But show me your urine first.'
'You said I was cured,' Thomas protested. 'Eternal vigilance, dear Thomas, is the price of health. Piss for me. "

― Bernard Cornwell , Vagabond (The Grail Quest, #2)