" Hidden pride is a most pernicious vice, the more so since it is not recognized and does not recognize itself. On the outside, it may appear gentle, mild, and even humble. Yet inside, it burns away bitterly. The person who is subject to such pride becomes inordinately elated when he is successful but is disturbed and dejected in the face of adversity or failure. "

― Thomas à Kempis , Humility and the Elevation of the Mind to God