¶ The first part intreateth of dyuers and sundrie errours and abuses of the vnlearned and wycked sorte of Physitions.
THAT excellente man & great clerk Aristoteles, who for his incompa∣rable doctrine is of all learned men named the prince of philosophers hath this saying in the .vii. boke of his Ethikes: Non oportet tantum verum dicere, sed etiam causam falsi assignare, that is: A man may not onely tell the truth, but he must al∣so shewe and declare the cause of falshod and errour. As who shold say: The truthe can neuer so well appere, as when it is compared to his contrary, which is errour, lye, and falshode. Quia opposita semper