Whoever has admitted this tyranny of pride within suffers this loss first of all, that from the eyes of his heart being closed, he loses the equitableness of judgement. For even all the good doings of others are displeasing to him and the things which he has done, even amiss, alone please him. He always looks down on the doings of others, he always admires his own doings; because whatever he has done he believes he has done with singular skill; and for that which he performs for desire of glory, he favours himself in his thought; and when he thinks he surpasses others in all things, he walks with himself along the broad spaces of his thought and silently utters his own praises.
St. Gregory the Great: On the Book of Job.
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