Evil does not approach us as pride any more, but on the contrary as slumber, lassitude, concealment of the "I." ... It may make us so quickly contented, that any definitive fire will die down. The venomous, breathtaking frigid mist seems able ... to harden hearts and fill them with envy, obduracy and resentment, with bloody scorn for the divine image and light, with all the causes of the only true original sin, which is not wanting to be like God.
Remember that pride is the worst viper that is in the heart, the greatest disturber of the soul's peace and sweet communion with Christ; it was the first sin that ever was, and lies lowest in the foundation of Satan's whole building, and is the most difficultly rooted out, and is the most hidden, secret and deceitful of all lusts, and often creeps in, insensibly, into the midst of religion and sometimes under the disguise of humility.
In reality there is, perhaps no one of our natural passions so hard to subdue as pride. Disguise it, struggle with it, stifle it, mortify it as much as one pleases, it is still alive and will every now and then peep out and show itself; you will see it, perhaps, often in this history. For even if I could conceive that I had completely overcome it, I should probably be proud of my humility.
Pride looks back upon its past deeds, and calculating with nicety what it has done, it commits itself to rest; whereas humility looks to that which is before, and discovering how much ground remains to be trodden, it is active and vigilant. Having gained one height, pride looks down with complacency on that which is beneath it; humility looks up to a higher and yet higher elevation. The one keeps us on this earth, which is congenial to its nature; the other directs our eye, and tends to lift us up to heaven.