mistakes

And Haiqar did obeisance to the king and said to him, 'May thy head live, O my lord the king, for ever! I seek from thee that thou mayst be patient with my boy Nadan and forgive his mistakes that he may serve thee as it is fitting.'

The king praised him and inquired of another, What is goal of speech? And he replied, 'To convince your opponent by showing him his mistakes in a well-ordered army of arguments.