I have recently been reading the book Humility: True Greatness by C.J. Mahaney. Mahaney does an excellent job of incorporating quotes from past saints into his book. I have found the following two quotes to be quite helpful:
A) "The pleasures of humility are really the most refined, inward, and exquisite delights in the world."
B) "It is evident that man never attains to a true self-knowledge until he has previously contemplated the face of God, and come down after such contemplation to look into himself."