St. John Climacus
“The Lord often humbles the vainglorious by causing some dishonor to befall them. And indeed the first step in overcoming vainglory is to remain silent and to accept dishonor gladly. The middle stage is to check every act of vainglory while it is still in thought. The end – insofar as one may talk of an end to an abyss – is to be able to accept humiliation before others without actually feeling it.”
Source: St. John Climacus, The Ladder of Divine Ascent