John Chrysostom

It is no humility to think that you are a sinner when you really are a sinner. But whenever one is conscious of having done many great deeds but does not imagine that he is something great in himself, that is true humility. When a man is like Paul and can say, "I have nothing on my conscience," and then can add, "But I am not justified by this," and can say again, "Christ Jesus came to save sinners of whom I am the chief," that is true humility. That man is truly humble who does exalted deeds but, in his own mind, sees himself as lowly.