St. Francis de Sales on Ingratitude
Consider particularly the sin of ingratitude toward God, a general sin that reaches out to all the rest and makes them infinitely more enormous. Note then all the benefits God has granted you and how you have misused all of them against the giver. Note especially how many of his inspirations you have despised and how many movements you have rendered useless...So often God has run after you to save you, and you have always run before him in order to destroy yourself.
from Introduction to the Devout Life (Image), p. 47, Part One, The Fourth Meditation- On Sin