What is humilty?

Learn what humility is, you who have devilish pride!  What then is humility?  To be lowly minded.  And he is lowly minded who humbles himself, not he who is lowly by necessity.  To explain what I say (and pay attention):  he who is lowly minded when he has it in his power to be high minded, is humble.  For he that humbleth himself shall be exalted.  St. John Chrysostom